21502031133504 has 224 divisors, whose sum is σ = 61809166460160. Its totient is φ = 6578856345600.

The previous prime is 21502031133493. The next prime is 21502031133547. The reversal of 21502031133504 is 40533113020512.

It is a super-2 number, since 2×21502031133504² (a number of 27 digits) contains 22 as substring.

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, 10070982 + ... + 12017850.

It is an arithmetic number, because the mean of its divisors is an integer number (275933778840).

Almost surely, 2^{21502031133504} is an apocalyptic number.

21502031133504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21502031133504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30904583230080).

21502031133504 is an abundant number, since it is smaller than the sum of its proper divisors (40307135326656).

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

21502031133504 is a wasteful number, since it uses less digits than its factorization.

21502031133504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947009 (or 1946999 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21502031133504 in words is "twenty-one trillion, five hundred two billion, thirty-one million, one hundred thirty-three thousand, five hundred four".