20797375 has 16 divisors (see below), whose sum is σ = 27484704. Its totient is φ = 15657600.

The previous prime is 20797363. The next prime is 20797411. The reversal of 20797375 is 57379702.

It is not a de Polignac number, because 20797375 - 2⁷ = 20797247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2769 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (1717794).

Almost surely, 2^20797375 is an apocalyptic number.

20797375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20797375 is a deficient number, since it is larger than the sum of its proper divisors (6687329).

20797375 is an equidigital number, since it uses as much as digits as its factorization.

20797375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9819 (or 9809 counting only the distinct ones).

The product of its (nonzero) digits is 92610, while the sum is 40.

The square root of 20797375 is about 4560.4139066536. The cubic root of 20797375 is about 275.0022038391.

The spelling of 20797375 in words is "twenty million, seven hundred ninety-seven thousand, three hundred seventy-five".