21523111452000 has 192 divisors, whose sum is σ = 78344126078400. Its totient is φ = 5739496358400.

The previous prime is 21523111451987. The next prime is 21523111452053. The reversal of 21523111452000 is 25411132512.

It is a happy number.

21523111452000 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 311 + 145 + 200 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99536035 + ... + 99752034.

It is an arithmetic number, because the mean of its divisors is an integer number (408042323325).

Almost surely, 2^{21523111452000} is an apocalyptic number.

21523111452000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21523111452000 is an abundant number, since it is smaller than the sum of its proper divisors (56821014626400).

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

21523111452000 is a wasteful number, since it uses less digits than its factorization.

21523111452000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199288103 (or 199288079 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 21523111452000 its reverse (25411132512), we get a palindrome (21548522584512).

The spelling of 21523111452000 in words is "twenty-one trillion, five hundred twenty-three billion, one hundred eleven million, four hundred fifty-two thousand".