20402372260 has 24 divisors (see below), whose sum is σ = 43653379896. Its totient is φ = 8006968320.

The previous prime is 20402372257. The next prime is 20402372261. The reversal of 20402372260 is 6227320402.

It can be written as a sum of positive squares in 4 ways, for example, as 1105828516 + 19296543744 = 33254^2 + 138912^2 .

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 7 ways as a sum of consecutive naturals, for example, 9622701 + ... + 9624820.

It is an arithmetic number, because the mean of its divisors is an integer number (1818890829).

Almost surely, 2^20402372260 is an apocalyptic number.

20402372260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402372260 is an abundant number, since it is smaller than the sum of its proper divisors (23251007636).

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

20402372260 is a wasteful number, since it uses less digits than its factorization.

20402372260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19247583 (or 19247581 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 20402372260 its reverse (6227320402), we get a palindrome (26629692662).

The spelling of 20402372260 in words is "twenty billion, four hundred two million, three hundred seventy-two thousand, two hundred sixty".