20321140624 has 20 divisors (see below), whose sum is σ = 39394724236. Its totient is φ = 10154760192.

The previous prime is 20321140607. The next prime is 20321140649. The reversal of 20321140624 is 42604112302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3441934224 + 16879206400 = 58668^2 + 129920^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334209 + ... + 390304.

Almost surely, 2^20321140624 is an apocalyptic number.

It is an amenable number.

20321140624 is a deficient number, since it is larger than the sum of its proper divisors (19073583612).

20321140624 is a wasteful number, since it uses less digits than its factorization.

20321140624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726274 (or 726268 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20321140624 its reverse (42604112302), we get a palindrome (62925252926).

The spelling of 20321140624 in words is "twenty billion, three hundred twenty-one million, one hundred forty thousand, six hundred twenty-four".