20662400264 has 32 divisors (see below), whose sum is σ = 42313471200. Its totient is φ = 9381006720.

The previous prime is 20662400203. The next prime is 20662400273. The reversal of 20662400264 is 46200426602.

It is a self number, because there is not a number n which added to its sum of digits gives 20662400264.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61574 + ... + 212405.

It is an arithmetic number, because the mean of its divisors is an integer number (1322295975).

Almost surely, 2^20662400264 is an apocalyptic number.

It is an amenable number.

20662400264 is an abundant number, since it is smaller than the sum of its proper divisors (21651070936).

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

20662400264 is a wasteful number, since it uses less digits than its factorization.

20662400264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274853 (or 274849 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 20662400264 its reverse (46200426602), we get a palindrome (66862826866).

The spelling of 20662400264 in words is "twenty billion, six hundred sixty-two million, four hundred thousand, two hundred sixty-four".