20118212737564 has 6 divisors (see below), whose sum is σ = 35206872290744. Its totient is φ = 10059106368780.

The previous prime is 20118212737549. The next prime is 20118212737607. The reversal of 20118212737564 is 46573721281102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2514776592192 + ... + 2514776592199.

Almost surely, 2^{20118212737564} is an apocalyptic number.

It is an amenable number.

20118212737564 is a deficient number, since it is larger than the sum of its proper divisors (15088659553180).

20118212737564 is a wasteful number, since it uses less digits than its factorization.

20118212737564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029553184395 (or 5029553184393 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 20118212737564 in words is "twenty trillion, one hundred eighteen billion, two hundred twelve million, seven hundred thirty-seven thousand, five hundred sixty-four".