21163523153200 has 60 divisors (see below), whose sum is σ = 51348783922848. Its totient is φ = 8381593312000.

The previous prime is 21163523153173. The next prime is 21163523153219. The reversal of 21163523153200 is 235132536112.

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, 261884392 + ... + 261965191.

Almost surely, 2^{21163523153200} is an apocalyptic number.

21163523153200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21163523153200 is an abundant number, since it is smaller than the sum of its proper divisors (30185260769648).

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

21163523153200 is a wasteful number, since it uses less digits than its factorization.

21163523153200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523849702 (or 523849691 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 21163523153200 its reverse (235132536112), we get a palindrome (21398655689312).

The spelling of 21163523153200 in words is "twenty-one trillion, one hundred sixty-three billion, five hundred twenty-three million, one hundred fifty-three thousand, two hundred".