23203402400 has 72 divisors (see below), whose sum is σ = 56672114940. Its totient is φ = 9276968960.

The previous prime is 23203402399. The next prime is 23203402423. The reversal of 23203402400 is 420430232.

It can be written as a sum of positive squares in 6 ways, for example, as 3680606224 + 19522796176 = 60668^2 + 139724^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 2081642 + ... + 2092758.

Almost surely, 2^23203402400 is an apocalyptic number.

23203402400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23203402400 is an abundant number, since it is smaller than the sum of its proper divisors (33468712540).

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

23203402400 is a wasteful number, since it uses less digits than its factorization.

23203402400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13746 (or 13733 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 23203402400 its reverse (420430232), we get a palindrome (23623832632).

The spelling of 23203402400 in words is "twenty-three billion, two hundred three million, four hundred two thousand, four hundred".