18051087015 has 96 divisors (see below), whose sum is σ = 34755739200. Its totient is φ = 8610048000.

The previous prime is 18051086981. The next prime is 18051087017. The reversal of 18051087015 is 51078015081.

It is a happy number.

It is not a de Polignac number, because 18051087015 - 2¹¹ = 18051084967 is a prime.

It is a super-2 number, since 2×18051087015² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18051087017) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3571240 + ... + 3576290.

It is an arithmetic number, because the mean of its divisors is an integer number (362038950).

Almost surely, 2^18051087015 is an apocalyptic number.

18051087015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18051087015 is a deficient number, since it is larger than the sum of its proper divisors (16704652185).

18051087015 is a wasteful number, since it uses less digits than its factorization.

18051087015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265 (or 5262 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 36.

The spelling of 18051087015 in words is "eighteen billion, fifty-one million, eighty-seven thousand, fifteen".