23220400400 has 60 divisors (see below), whose sum is σ = 55801814244. Its totient is φ = 9285696000.

The previous prime is 23220400381. The next prime is 23220400417. The reversal of 23220400400 is 400402232.

It can be written as a sum of positive squares in 6 ways, for example, as 1022976256 + 22197424144 = 31984^2 + 148988^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2627990 + ... + 2636810.

Almost surely, 2^23220400400 is an apocalyptic number.

23220400400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23220400400 is an abundant number, since it is smaller than the sum of its proper divisors (32581413844).

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

23220400400 is a wasteful number, since it uses less digits than its factorization.

23220400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15420 (or 15409 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 23220400400 its reverse (400402232), we get a palindrome (23620802632).

The spelling of 23220400400 in words is "twenty-three billion, two hundred twenty million, four hundred thousand, four hundred".