21624536060 has 36 divisors (see below), whose sum is σ = 47471807208. Its totient is φ = 8273731488.

The previous prime is 21624536039. The next prime is 21624536107. The reversal of 21624536060 is 6063542612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21624536060.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1011374 + ... + 1032533.

Almost surely, 2^21624536060 is an apocalyptic number.

21624536060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21624536060 is an abundant number, since it is smaller than the sum of its proper divisors (25847271148).

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

21624536060 is a wasteful number, since it uses less digits than its factorization.

21624536060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043962 (or 2043937 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 21624536060 in words is "twenty-one billion, six hundred twenty-four million, five hundred thirty-six thousand, sixty".