20658875890 has 16 divisors (see below), whose sum is σ = 37216206720. Its totient is φ = 8256832560.

The previous prime is 20658875857. The next prime is 20658875903. The reversal of 20658875890 is 9857885602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826800 + ... + 851419.

It is an arithmetic number, because the mean of its divisors is an integer number (2326012920).

Almost surely, 2^20658875890 is an apocalyptic number.

20658875890 is a deficient number, since it is larger than the sum of its proper divisors (16557330830).

20658875890 is a wasteful number, since it uses less digits than its factorization.

20658875890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679457.

The product of its (nonzero) digits is 9676800, while the sum is 58.

The spelling of 20658875890 in words is "twenty billion, six hundred fifty-eight million, eight hundred seventy-five thousand, eight hundred ninety".