20515620361012 has 96 divisors (see below), whose sum is σ = 41509603699200. Its totient is φ = 8690248968192.

The previous prime is 20515620360997. The next prime is 20515620361099. The reversal of 20515620361012 is 21016302651502.

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 31 ways as a sum of consecutive naturals, for example, 5443251064 + ... + 5443254832.

It is an arithmetic number, because the mean of its divisors is an integer number (432391705200).

Almost surely, 2^{20515620361012} is an apocalyptic number.

It is an amenable number.

20515620361012 is an abundant number, since it is smaller than the sum of its proper divisors (20993983338188).

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

20515620361012 is a wasteful number, since it uses less digits than its factorization.

20515620361012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025 (or 7023 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 20515620361012 in words is "twenty trillion, five hundred fifteen billion, six hundred twenty million, three hundred sixty-one thousand, twelve".