18054390156 has 72 divisors (see below), whose sum is σ = 46338774720. Its totient is φ = 5467012320.

The previous prime is 18054390143. The next prime is 18054390157. The reversal of 18054390156 is 65109345081.

It is a super-2 number, since 2×18054390156² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18054390157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2416755 + ... + 2424213.

Almost surely, 2^18054390156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18054390156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23169387360).

18054390156 is an abundant number, since it is smaller than the sum of its proper divisors (28284384564).

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

18054390156 is a wasteful number, since it uses less digits than its factorization.

18054390156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9155 (or 9142 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 18054390156 in words is "eighteen billion, fifty-four million, three hundred ninety thousand, one hundred fifty-six".