20290870875 has 32 divisors (see below), whose sum is σ = 36833472000. Its totient is φ = 9837996000.

The previous prime is 20290870861. The next prime is 20290870891. The reversal of 20290870875 is 57807809202.

It is not a de Polignac number, because 20290870875 - 2¹¹ = 20290868827 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2455375 + ... + 2463624.

It is an arithmetic number, because the mean of its divisors is an integer number (1151046000).

Almost surely, 2^20290870875 is an apocalyptic number.

20290870875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20290870875 is a deficient number, since it is larger than the sum of its proper divisors (16542601125).

20290870875 is a wasteful number, since it uses less digits than its factorization.

20290870875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919028 (or 4919018 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 20290870875 in words is "twenty billion, two hundred ninety million, eight hundred seventy thousand, eight hundred seventy-five".