18015222960 has 280 divisors, whose sum is σ = 71772325920. Its totient is φ = 4117671936.

The previous prime is 18015222937. The next prime is 18015222961. The reversal of 18015222960 is 6922251081.

It is a tau number, because it is divible by the number of its divisors (280).

It is a super-2 number, since 2×18015222960² (a number of 21 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (18015222961) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 386176 + ... + 430304.

Almost surely, 2^18015222960 is an apocalyptic number.

18015222960 is a gapful number since it is divisible by the number (10) 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 18015222960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35886162960).

18015222960 is an abundant number, since it is smaller than the sum of its proper divisors (53757102960).

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

18015222960 is an equidigital number, since it uses as much as digits as its factorization.

18015222960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44167 (or 44146 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 18015222960 in words is "eighteen billion, fifteen million, two hundred twenty-two thousand, nine hundred sixty".