20612562618 has 16 divisors (see below), whose sum is σ = 41230584576. Its totient is φ = 6869944320.

The previous prime is 20612562613. The next prime is 20612562629. The reversal of 20612562618 is 81626521602.

It is not an unprimeable number, because it can be changed into a prime (20612562613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177546 + ... + 269717.

It is an arithmetic number, because the mean of its divisors is an integer number (2576911536).

Almost surely, 2^20612562618 is an apocalyptic number.

20612562618 is an abundant number, since it is smaller than the sum of its proper divisors (20618021958).

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

20612562618 is a wasteful number, since it uses less digits than its factorization.

20612562618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454949.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 20612562618 in words is "twenty billion, six hundred twelve million, five hundred sixty-two thousand, six hundred eighteen".