20650592664 has 144 divisors (see below), whose sum is σ = 61852096800. Its totient is φ = 6218664192.

The previous prime is 20650592623. The next prime is 20650592671. The reversal of 20650592664 is 46629505602.

It is a happy number.

20650592664 is a `hidden beast` number, since 2 + 0 + 6 + 50 + 592 + 6 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 553842 + ... + 589950.

It is an arithmetic number, because the mean of its divisors is an integer number (429528450).

Almost surely, 2^20650592664 is an apocalyptic number.

20650592664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20650592664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30926048400).

20650592664 is an abundant number, since it is smaller than the sum of its proper divisors (41201504136).

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

20650592664 is a wasteful number, since it uses less digits than its factorization.

20650592664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36194 (or 36174 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 20650592664 in words is "twenty billion, six hundred fifty million, five hundred ninety-two thousand, six hundred sixty-four".