18227165415 has 64 divisors (see below), whose sum is σ = 29962867200. Its totient is φ = 9459141120.

The previous prime is 18227165399. The next prime is 18227165431. The reversal of 18227165415 is 51456172281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18227165399) and next prime (18227165431).

It is not a de Polignac number, because 18227165415 - 2⁴ = 18227165399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52226661 + ... + 52227009.

It is an arithmetic number, because the mean of its divisors is an integer number (468169800).

Almost surely, 2^18227165415 is an apocalyptic number.

18227165415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18227165415 is a deficient number, since it is larger than the sum of its proper divisors (11735701785).

18227165415 is a wasteful number, since it uses less digits than its factorization.

18227165415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912.

The product of its digits is 134400, while the sum is 42.

The spelling of 18227165415 in words is "eighteen billion, two hundred twenty-seven million, one hundred sixty-five thousand, four hundred fifteen".