19865307893232 has 40 divisors (see below), whose sum is σ = 53088322821840. Its totient is φ = 6393432424960.

The previous prime is 19865307893141. The next prime is 19865307893309. The reversal of 19865307893232 is 23239870356891.

It is a super-2 number, since 2×19865307893232² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7135525869 + ... + 7135528652.

It is an arithmetic number, because the mean of its divisors is an integer number (1327208070546).

Almost surely, 2^{19865307893232} is an apocalyptic number.

19865307893232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19865307893232 is an abundant number, since it is smaller than the sum of its proper divisors (33223014928608).

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

19865307893232 is a wasteful number, since it uses less digits than its factorization.

19865307893232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14271054561 (or 14271054555 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 66.

The spelling of 19865307893232 in words is "nineteen trillion, eight hundred sixty-five billion, three hundred seven million, eight hundred ninety-three thousand, two hundred thirty-two".