20450520256636 has 12 divisors (see below), whose sum is σ = 35858721671640. Its totient is φ = 10205171207600.

The previous prime is 20450520256603. The next prime is 20450520256687. The reversal of 20450520256636 is 63665202505402.

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 3 ways as a sum of consecutive naturals, for example, 5022227890 + ... + 5022231961.

It is an arithmetic number, because the mean of its divisors is an integer number (2988226805970).

Almost surely, 2^{20450520256636} is an apocalyptic number.

It is an amenable number.

20450520256636 is a deficient number, since it is larger than the sum of its proper divisors (15408201415004).

20450520256636 is a wasteful number, since it uses less digits than its factorization.

20450520256636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10044460364 (or 10044460362 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 46.

The spelling of 20450520256636 in words is "twenty trillion, four hundred fifty billion, five hundred twenty million, two hundred fifty-six thousand, six hundred thirty-six".