19840013252 has 24 divisors (see below), whose sum is σ = 35954233560. Its totient is φ = 9568079360.

The previous prime is 19840013231. The next prime is 19840013309. The reversal of 19840013252 is 25231004891.

It can be written as a sum of positive squares in 4 ways, for example, as 2030043136 + 17809970116 = 45056^2 + 133454^2 .

It is a super-2 number, since 2×19840013252² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25802 + ... + 200862.

It is an arithmetic number, because the mean of its divisors is an integer number (1498093065).

Almost surely, 2^19840013252 is an apocalyptic number.

It is an amenable number.

19840013252 is a deficient number, since it is larger than the sum of its proper divisors (16114220308).

19840013252 is a wasteful number, since it uses less digits than its factorization.

19840013252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176071 (or 176069 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 19840013252 in words is "nineteen billion, eight hundred forty million, thirteen thousand, two hundred fifty-two".