22059531618 has 16 divisors (see below), whose sum is σ = 44120615520. Its totient is φ = 7352918496.

The previous prime is 22059531607. The next prime is 22059531631. The reversal of 22059531618 is 81613595022.

It is a self number, because there is not a number n which added to its sum of digits gives 22059531618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209421 + ... + 296607.

It is an arithmetic number, because the mean of its divisors is an integer number (2757538470).

Almost surely, 2^22059531618 is an apocalyptic number.

22059531618 is an abundant number, since it is smaller than the sum of its proper divisors (22061083902).

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

22059531618 is a wasteful number, since it uses less digits than its factorization.

22059531618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129361.

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

The spelling of 22059531618 in words is "twenty-two billion, fifty-nine million, five hundred thirty-one thousand, six hundred eighteen".