18926920488 has 256 divisors, whose sum is σ = 58475520000. Its totient is φ = 4982575104.

The previous prime is 18926920477. The next prime is 18926920511. The reversal of 18926920488 is 88402962981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33617695 + ... + 33618257.

It is an arithmetic number, because the mean of its divisors is an integer number (228420000).

Almost surely, 2^18926920488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18926920488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29237760000).

18926920488 is an abundant number, since it is smaller than the sum of its proper divisors (39548599512).

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

18926920488 is a wasteful number, since it uses less digits than its factorization.

18926920488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 18926920488 in words is "eighteen billion, nine hundred twenty-six million, nine hundred twenty thousand, four hundred eighty-eight".