20764875 has 16 divisors (see below), whose sum is σ = 34553376. Its totient is φ = 11074400.

The previous prime is 20764867. The next prime is 20764879. The reversal of 20764875 is 57846702.

It is not a de Polignac number, because 20764875 - 2³ = 20764867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20764879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27312 + ... + 28061.

It is an arithmetic number, because the mean of its divisors is an integer number (2159586).

Almost surely, 2^20764875 is an apocalyptic number.

20764875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20764875 is a deficient number, since it is larger than the sum of its proper divisors (13788501).

20764875 is an equidigital number, since it uses as much as digits as its factorization.

20764875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55391 (or 55381 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 20764875 is about 4556.8492404292. The cubic root of 20764875 is about 274.8588807636.

The spelling of 20764875 in words is "twenty million, seven hundred sixty-four thousand, eight hundred seventy-five".