20100032320 has 28 divisors (see below), whose sum is σ = 47863202724. Its totient is φ = 8040012800.

The previous prime is 20100032299. The next prime is 20100032377. The reversal of 20100032320 is 2323000102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10954552896 + 9145479424 = 104664^2 + 95632^2 .

It is a super-2 number, since 2×20100032320² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20100032320.

It is a congruent number.

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, 31405981 + ... + 31406620.

Almost surely, 2^20100032320 is an apocalyptic number.

20100032320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100032320 is an abundant number, since it is smaller than the sum of its proper divisors (27763170404).

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

20100032320 is an equidigital number, since it uses as much as digits as its factorization.

20100032320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62812618 (or 62812608 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20100032320 its reverse (2323000102), we get a palindrome (22423032422).

The spelling of 20100032320 in words is "twenty billion, one hundred million, thirty-two thousand, three hundred twenty".