18426976164 has 72 divisors (see below), whose sum is σ = 47211255000. Its totient is φ = 6059311104.

The previous prime is 18426976157. The next prime is 18426976189. The reversal of 18426976164 is 46167962481.

18426976164 is a `hidden beast` number, since 18 + 4 + 2 + 6 + 9 + 7 + 616 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 644753664 + 17782222500 = 25392^2 + 133350^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18426976164.

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, 1432192 + ... + 1445000.

It is an arithmetic number, because the mean of its divisors is an integer number (655711875).

Almost surely, 2^18426976164 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 18426976164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23605627500).

18426976164 is an abundant number, since it is smaller than the sum of its proper divisors (28784278836).

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

18426976164 is a wasteful number, since it uses less digits than its factorization.

18426976164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13357 (or 13352 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 18426976164 in words is "eighteen billion, four hundred twenty-six million, nine hundred seventy-six thousand, one hundred sixty-four".