20497173875 has 24 divisors (see below), whose sum is σ = 26997733152. Its totient is φ = 15534666000.

The previous prime is 20497173859. The next prime is 20497173883. The reversal of 20497173875 is 57837179402.

It is not a de Polignac number, because 20497173875 - 2⁴ = 20497173859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181991 + ... + 272240.

It is an arithmetic number, because the mean of its divisors is an integer number (1124905548).

Almost surely, 2^20497173875 is an apocalyptic number.

20497173875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20497173875 is a deficient number, since it is larger than the sum of its proper divisors (6500559277).

20497173875 is an equidigital number, since it uses as much as digits as its factorization.

20497173875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454284 (or 454255 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 20497173875 in words is "twenty billion, four hundred ninety-seven million, one hundred seventy-three thousand, eight hundred seventy-five".