19731300885 has 12 divisors (see below), whose sum is σ = 34200921612. Its totient is φ = 10523360448.

The previous prime is 19731300877. The next prime is 19731300893. The reversal of 19731300885 is 58800313791.

It is an interprime number because it is at equal distance from previous prime (19731300877) and next prime (19731300893).

It can be written as a sum of positive squares in 2 ways, for example, as 6998660964 + 12732639921 = 83658^2 + 112839^2 .

It is not a de Polignac number, because 19731300885 - 2³ = 19731300877 is a prime.

It is a super-2 number, since 2×19731300885² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 438473353 = 19731300885 / (1 + 9 + 7 + 3 + 1 + 3 + 0 + 0 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 19731300885.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219236632 + ... + 219236721.

It is an arithmetic number, because the mean of its divisors is an integer number (2850076801).

Almost surely, 2^19731300885 is an apocalyptic number.

19731300885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19731300885 is a deficient number, since it is larger than the sum of its proper divisors (14469620727).

19731300885 is a wasteful number, since it uses less digits than its factorization.

19731300885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438473364 (or 438473361 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 19731300885 in words is "nineteen billion, seven hundred thirty-one million, three hundred thousand, eight hundred eighty-five".