18162087216 has 160 divisors (see below), whose sum is σ = 57914626560. Its totient is φ = 4776026112.

The previous prime is 18162087191. The next prime is 18162087253. The reversal of 18162087216 is 61278026181.

It is a super-2 number, since 2×18162087216² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1536015 + ... + 1547793.

It is an arithmetic number, because the mean of its divisors is an integer number (361966416).

Almost surely, 2^18162087216 is an apocalyptic number.

18162087216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18162087216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28957313280).

18162087216 is an abundant number, since it is smaller than the sum of its proper divisors (39752539344).

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

18162087216 is a wasteful number, since it uses less digits than its factorization.

18162087216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163 (or 12157 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 18162087216 in words is "eighteen billion, one hundred sixty-two million, eighty-seven thousand, two hundred sixteen".