21504292848 has 60 divisors (see below), whose sum is σ = 61808712888. Its totient is φ = 6974363520.

The previous prime is 21504292847. The next prime is 21504292867. The reversal of 21504292848 is 84829240512.

21504292848 is a `hidden beast` number, since 215 + 0 + 429 + 2 + 8 + 4 + 8 = 666.

It is a super-2 number, since 2×21504292848² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21504292847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2012718 + ... + 2023373.

Almost surely, 2^21504292848 is an apocalyptic number.

It is an amenable number.

21504292848 is an abundant number, since it is smaller than the sum of its proper divisors (40304420040).

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

21504292848 is a wasteful number, since it uses less digits than its factorization.

21504292848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036142 (or 4036133 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 21504292848 in words is "twenty-one billion, five hundred four million, two hundred ninety-two thousand, eight hundred forty-eight".