19931102256 has 80 divisors (see below), whose sum is σ = 55564054784. Its totient is φ = 6119960832.

The previous prime is 19931102221. The next prime is 19931102267. The reversal of 19931102256 is 65220113991.

It is a super-3 number, since 3×19931102256³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271095 + ... + 336681.

Almost surely, 2^19931102256 is an apocalyptic number.

19931102256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19931102256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27782027392).

19931102256 is an abundant number, since it is smaller than the sum of its proper divisors (35632952528).

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

19931102256 is a wasteful number, since it uses less digits than its factorization.

19931102256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66098 (or 66092 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The spelling of 19931102256 in words is "nineteen billion, nine hundred thirty-one million, one hundred two thousand, two hundred fifty-six".