18725830656 has 128 divisors (see below), whose sum is σ = 53779593840. Its totient is φ = 5761400832.

The previous prime is 18725830639. The next prime is 18725830759. The reversal of 18725830656 is 65603852781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 18725830599 and 18725830608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270626 + ... + 1285278.

Almost surely, 2^18725830656 is an apocalyptic number.

18725830656 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 18725830656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26889796920).

18725830656 is an abundant number, since it is smaller than the sum of its proper divisors (35053763184).

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

18725830656 is an equidigital number, since it uses as much as digits as its factorization.

18725830656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14699 (or 14671 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 18725830656 in words is "eighteen billion, seven hundred twenty-five million, eight hundred thirty thousand, six hundred fifty-six".