18071102736 has 60 divisors (see below), whose sum is σ = 50719041100. Its totient is φ = 6006424320.

The previous prime is 18071102689. The next prime is 18071102761. The reversal of 18071102736 is 63720117081.

It can be written as a sum of positive squares in 2 ways, for example, as 6502809600 + 11568293136 = 80640^2 + 107556^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18071102736.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129535 + ... + 230046.

Almost surely, 2^18071102736 is an apocalyptic number.

18071102736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18071102736 is an abundant number, since it is smaller than the sum of its proper divisors (32647938364).

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

18071102736 is a wasteful number, since it uses less digits than its factorization.

18071102736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359944 (or 359935 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The spelling of 18071102736 in words is "eighteen billion, seventy-one million, one hundred two thousand, seven hundred thirty-six".