20556622352215 has 32 divisors (see below), whose sum is σ = 24949927929600. Its totient is φ = 16258709913600.

The previous prime is 20556622352179. The next prime is 20556622352239. The reversal of 20556622352215 is 51225322665502.

It is not a de Polignac number, because 20556622352215 - 2¹⁵ = 20556622319447 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 96493815 + ... + 96706615.

It is an arithmetic number, because the mean of its divisors is an integer number (779685247800).

Almost surely, 2^{20556622352215} is an apocalyptic number.

20556622352215 is a deficient number, since it is larger than the sum of its proper divisors (4393305577385).

20556622352215 is a wasteful number, since it uses less digits than its factorization.

20556622352215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213627.

The product of its (nonzero) digits is 2160000, while the sum is 46.

The spelling of 20556622352215 in words is "twenty trillion, five hundred fifty-six billion, six hundred twenty-two million, three hundred fifty-two thousand, two hundred fifteen".