18088395912 has 24 divisors (see below), whose sum is σ = 48989405790. Its totient is φ = 6029465280.

The previous prime is 18088395893. The next prime is 18088395937. The reversal of 18088395912 is 21959388081.

18088395912 is a `hidden beast` number, since 18 + 0 + 8 + 8 + 39 + 591 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13449968676 + 4638427236 = 115974^2 + 68106^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125613789 + ... + 125613932.

Almost surely, 2^18088395912 is an apocalyptic number.

18088395912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18088395912 is an abundant number, since it is smaller than the sum of its proper divisors (30901009878).

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

18088395912 is a wasteful number, since it uses less digits than its factorization.

18088395912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251227733 (or 251227726 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 18088395912 in words is "eighteen billion, eighty-eight million, three hundred ninety-five thousand, nine hundred twelve".