20515210050056 has 32 divisors (see below), whose sum is σ = 41829502218840. Its totient is φ = 9393291721728.

The previous prime is 20515210050001. The next prime is 20515210050131. The reversal of 20515210050056 is 65005001251502.

It can be written as a sum of positive squares in 4 ways, for example, as 18354798062500 + 2160411987556 = 4284250^2 + 1469834^2 .

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 7 ways as a sum of consecutive naturals, for example, 2038469735 + ... + 2038479798.

Almost surely, 2^{20515210050056} is an apocalyptic number.

It is an amenable number.

20515210050056 is an abundant number, since it is smaller than the sum of its proper divisors (21314292168784).

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

20515210050056 is a wasteful number, since it uses less digits than its factorization.

20515210050056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4076949593 (or 4076949589 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 20515210050056 in words is "twenty trillion, five hundred fifteen billion, two hundred ten million, fifty thousand, fifty-six".