18926275816 has 64 divisors (see below), whose sum is σ = 41840225280. Its totient is φ = 7856455680.

The previous prime is 18926275787. The next prime is 18926275847. The reversal of 18926275816 is 61857262981.

It is a happy number.

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, 441576 + ... + 482536.

It is an arithmetic number, because the mean of its divisors is an integer number (653753520).

Almost surely, 2^18926275816 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 18926275816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20920112640).

18926275816 is an abundant number, since it is smaller than the sum of its proper divisors (22913949464).

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

18926275816 is a wasteful number, since it uses less digits than its factorization.

18926275816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41234 (or 41230 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The spelling of 18926275816 in words is "eighteen billion, nine hundred twenty-six million, two hundred seventy-five thousand, eight hundred sixteen".