18626147916 has 12 divisors (see below), whose sum is σ = 43461011832. Its totient is φ = 6208715968.

The previous prime is 18626147899. The next prime is 18626147951. The reversal of 18626147916 is 61974162681.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×18626147916² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776089485 + ... + 776089508.

It is an arithmetic number, because the mean of its divisors is an integer number (3621750986).

Almost surely, 2^18626147916 is an apocalyptic number.

It is an amenable number.

18626147916 is an abundant number, since it is smaller than the sum of its proper divisors (24834863916).

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

18626147916 is a wasteful number, since it uses less digits than its factorization.

18626147916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552179000 (or 1552178998 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The spelling of 18626147916 in words is "eighteen billion, six hundred twenty-six million, one hundred forty-seven thousand, nine hundred sixteen".