21624520545316 has 12 divisors (see below), whose sum is σ = 40753904104732. Its totient is φ = 9980547943968.

The previous prime is 21624520545289. The next prime is 21624520545323. The reversal of 21624520545316 is 61354502542612.

It can be written as a sum of positive squares in 2 ways, for example, as 3799692518400 + 17824828026916 = 1949280^2 + 4221946^2 .

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 3 ways as a sum of consecutive naturals, for example, 207928082115 + ... + 207928082218.

Almost surely, 2^{21624520545316} is an apocalyptic number.

21624520545316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21624520545316 is a deficient number, since it is larger than the sum of its proper divisors (19129383559416).

21624520545316 is a wasteful number, since it uses less digits than its factorization.

21624520545316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415856164350 (or 415856164348 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 21624520545316 in words is "twenty-one trillion, six hundred twenty-four billion, five hundred twenty million, five hundred forty-five thousand, three hundred sixteen".