18162156700 has 36 divisors (see below), whose sum is σ = 40477074232. Its totient is φ = 7068513600.

The previous prime is 18162156689. The next prime is 18162156707. The reversal of 18162156700 is 765126181.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 18162156700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18162156707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2450646 + ... + 2458045.

Almost surely, 2^18162156700 is an apocalyptic number.

18162156700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18162156700 is an abundant number, since it is smaller than the sum of its proper divisors (22314917532).

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

18162156700 is a wasteful number, since it uses less digits than its factorization.

18162156700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908742 (or 4908735 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 18162156700 in words is "eighteen billion, one hundred sixty-two million, one hundred fifty-six thousand, seven hundred".