20638952570 has 16 divisors (see below), whose sum is σ = 37165266720. Its totient is φ = 8252213904.

The previous prime is 20638952539. The next prime is 20638952591. The reversal of 20638952570 is 7525983602.

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, 395072 + ... + 444251.

It is an arithmetic number, because the mean of its divisors is an integer number (2322829170).

Almost surely, 2^20638952570 is an apocalyptic number.

20638952570 is a deficient number, since it is larger than the sum of its proper divisors (16526314150).

20638952570 is a wasteful number, since it uses less digits than its factorization.

20638952570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841789.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 20638952570 in words is "twenty billion, six hundred thirty-eight million, nine hundred fifty-two thousand, five hundred seventy".