19853018320 has 20 divisors (see below), whose sum is σ = 46158267780. Its totient is φ = 7941207296.

The previous prime is 19853018309. The next prime is 19853018321. The reversal of 19853018320 is 2381035891.

It can be written as a sum of positive squares in 2 ways, for example, as 11929882176 + 7923136144 = 109224^2 + 89012^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19853018321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124081285 + ... + 124081444.

It is an arithmetic number, because the mean of its divisors is an integer number (2307913389).

Almost surely, 2^19853018320 is an apocalyptic number.

19853018320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19853018320 is an abundant number, since it is smaller than the sum of its proper divisors (26305249460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19853018320 is a wasteful number, since it uses less digits than its factorization.

19853018320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248162742 (or 248162736 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 19853018320 in words is "nineteen billion, eight hundred fifty-three million, eighteen thousand, three hundred twenty".