20768875 has 8 divisors (see below), whose sum is σ = 25919712. Its totient is φ = 16615000.

The previous prime is 20768873. The next prime is 20768887. The reversal of 20768875 is 57886702.

It is a happy number.

It is not a de Polignac number, because 20768875 - 2¹ = 20768873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20768873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82951 + ... + 83200.

It is an arithmetic number, because the mean of its divisors is an integer number (3239964).

Almost surely, 2^20768875 is an apocalyptic number.

20768875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20768875 is a deficient number, since it is larger than the sum of its proper divisors (5150837).

20768875 is an equidigital number, since it uses as much as digits as its factorization.

20768875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166166 (or 166156 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 20768875 is about 4557.2881190462. The cubic root of 20768875 is about 274.8765285933.

The spelling of 20768875 in words is "twenty million, seven hundred sixty-eight thousand, eight hundred seventy-five".