19231700256 has 144 divisors (see below), whose sum is σ = 55485349920. Its totient is φ = 6317752320.

The previous prime is 19231700183. The next prime is 19231700281. The reversal of 19231700256 is 65200713291.

19231700256 is a `hidden beast` number, since 1 + 92 + 317 + 0 + 0 + 256 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 19231700256.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13648480 + ... + 13649888.

It is an arithmetic number, because the mean of its divisors is an integer number (385314930).

Almost surely, 2^19231700256 is an apocalyptic number.

19231700256 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 19231700256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27742674960).

19231700256 is an abundant number, since it is smaller than the sum of its proper divisors (36253649664).

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

19231700256 is a wasteful number, since it uses less digits than its factorization.

19231700256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079 (or 2068 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 19231700256 in words is "nineteen billion, two hundred thirty-one million, seven hundred thousand, two hundred fifty-six".