21325514616 has 96 divisors (see below), whose sum is σ = 67354716000. Its totient is φ = 6092997120.

The previous prime is 21325514611. The next prime is 21325514669. The reversal of 21325514616 is 61641552312.

21325514616 is a `hidden beast` number, since 2 + 1 + 3 + 25 + 5 + 14 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325514611) 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 23 ways as a sum of consecutive naturals, for example, 407065 + ... + 456456.

It is an arithmetic number, because the mean of its divisors is an integer number (701611625).

Almost surely, 2^21325514616 is an apocalyptic number.

It is an amenable number.

21325514616 is an abundant number, since it is smaller than the sum of its proper divisors (46029201384).

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

21325514616 is a wasteful number, since it uses less digits than its factorization.

21325514616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863554 (or 863533 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The spelling of 21325514616 in words is "twenty-one billion, three hundred twenty-five million, five hundred fourteen thousand, six hundred sixteen".