23399820900 has 81 divisors (see below), whose sum is σ = 73359825721. Its totient is φ = 6238728480.

The previous prime is 23399820859. The next prime is 23399820907. The reversal of 23399820900 is 902899332.

The square root of 23399820900 is 152970.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8423935524 + 14975885376 = 91782^2 + 122376^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23399820907) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4586551 + ... + 4591649.

Almost surely, 2^23399820900 is an apocalyptic number.

23399820900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

23399820900 is the 152970-th square number.

It is an amenable number.

23399820900 is an abundant number, since it is smaller than the sum of its proper divisors (49960004821).

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

23399820900 is an equidigital number, since it uses as much as digits as its factorization.

23399820900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218 (or 5109 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 23399820900 in words is "twenty-three billion, three hundred ninety-nine million, eight hundred twenty thousand, nine hundred".