21502540222848 has 128 divisors (see below), whose sum is σ = 63763129929600. Its totient is φ = 7133543907840.

The previous prime is 21502540222847. The next prime is 21502540222853. The reversal of 21502540222848 is 84822204520512.

21502540222848 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 2 + 540 + 2 + 22 + 84 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×21502540222848² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21502540222847) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14014386 + ... + 15472817.

It is an arithmetic number, because the mean of its divisors is an integer number (498149452575).

Almost surely, 2^{21502540222848} is an apocalyptic number.

It is an amenable number.

21502540222848 is an abundant number, since it is smaller than the sum of its proper divisors (42260589706752).

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

21502540222848 is a wasteful number, since it uses less digits than its factorization.

21502540222848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29487437 (or 29487419 counting only the distinct ones).

The product of its (nonzero) digits is 819200, while the sum is 45.

The spelling of 21502540222848 in words is "twenty-one trillion, five hundred two billion, five hundred forty million, two hundred twenty-two thousand, eight hundred forty-eight".