23520020400 has 90 divisors (see below), whose sum is σ = 81621016620. Its totient is φ = 6272004480.

The previous prime is 23520020369. The next prime is 23520020411. The reversal of 23520020400 is 402002532.

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3263070 + ... + 3270269.

Almost surely, 2^23520020400 is an apocalyptic number.

23520020400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23520020400 is an abundant number, since it is smaller than the sum of its proper divisors (58100996220).

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

23520020400 is a wasteful number, since it uses less digits than its factorization.

23520020400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6533363 (or 6533349 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

Adding to 23520020400 its reverse (402002532), we get a palindrome (23922022932).

The spelling of 23520020400 in words is "twenty-three billion, five hundred twenty million, twenty thousand, four hundred".