20402372264 has 16 divisors (see below), whose sum is σ = 38489140320. Its totient is φ = 10138601520.

The previous prime is 20402372261. The next prime is 20402372281. The reversal of 20402372264 is 46227320402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402372264.

It is not an unprimeable number, because it can be changed into a prime (20402372261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7821692 + ... + 7824299.

It is an arithmetic number, because the mean of its divisors is an integer number (2405571270).

Almost surely, 2^20402372264 is an apocalyptic number.

It is an amenable number.

20402372264 is a deficient number, since it is larger than the sum of its proper divisors (18086768056).

20402372264 is a wasteful number, since it uses less digits than its factorization.

20402372264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15646160 (or 15646156 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 32.

Adding to 20402372264 its reverse (46227320402), we get a palindrome (66629692666).

The spelling of 20402372264 in words is "twenty billion, four hundred two million, three hundred seventy-two thousand, two hundred sixty-four".