19677992256 has 252 divisors, whose sum is σ = 63346413312. Its totient is φ = 6053958144.

The previous prime is 19677992249. The next prime is 19677992281. The reversal of 19677992256 is 65229977691.

It is a junction number, because it is equal to n+sod(n) for n = 19677992193 and 19677992202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2624545 + ... + 2632031.

It is an arithmetic number, because the mean of its divisors is an integer number (251374656).

Almost surely, 2^19677992256 is an apocalyptic number.

19677992256 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 19677992256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31673206656).

19677992256 is an abundant number, since it is smaller than the sum of its proper divisors (43668421056).

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

19677992256 is an equidigital number, since it uses as much as digits as its factorization.

19677992256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540 (or 7505 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 63.

The spelling of 19677992256 in words is "nineteen billion, six hundred seventy-seven million, nine hundred ninety-two thousand, two hundred fifty-six".