20165554612 has 24 divisors (see below), whose sum is σ = 42084637056. Its totient is φ = 8266624608.

The previous prime is 20165554597. The next prime is 20165554613. The reversal of 20165554612 is 21645556102.

20165554612 is nontrivially palindromic in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165554613) 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, 15655843 + ... + 15657130.

It is an arithmetic number, because the mean of its divisors is an integer number (1753526544).

Almost surely, 2^20165554612 is an apocalyptic number.

It is an amenable number.

20165554612 is an abundant number, since it is smaller than the sum of its proper divisors (21919082444).

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

20165554612 is a wasteful number, since it uses less digits than its factorization.

20165554612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31313007 (or 31313005 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 20165554612 in words is "twenty billion, one hundred sixty-five million, five hundred fifty-four thousand, six hundred twelve".