20886814164 has 24 divisors (see below), whose sum is σ = 48740795488. Its totient is φ = 6961572000.

The previous prime is 20886814163. The next prime is 20886814177. The reversal of 20886814164 is 46141868802.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886814163) 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, 45039 + ... + 209289.

Almost surely, 2^20886814164 is an apocalyptic number.

It is an amenable number.

20886814164 is an abundant number, since it is smaller than the sum of its proper divisors (27853981324).

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

20886814164 is a wasteful number, since it uses less digits than its factorization.

20886814164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174855 (or 174853 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 48.

The spelling of 20886814164 in words is "twenty billion, eight hundred eighty-six million, eight hundred fourteen thousand, one hundred sixty-four".