20567879 has 4 divisors (see below), whose sum is σ = 20592576. Its totient is φ = 20543184.

The previous prime is 20567867. The next prime is 20567891. The reversal of 20567879 is 97876502.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20567867) and next prime (20567891).

It is a cyclic number.

It is not a de Polignac number, because 20567879 - 2²⁰ = 19519303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20567809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11054 + ... + 12779.

It is an arithmetic number, because the mean of its divisors is an integer number (5148144).

Almost surely, 2^20567879 is an apocalyptic number.

20567879 is a deficient number, since it is larger than the sum of its proper divisors (24697).

20567879 is an equidigital number, since it uses as much as digits as its factorization.

20567879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24696.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 20567879 is about 4535.1823557604. The cubic root of 20567879 is about 273.9869237371.

The spelling of 20567879 in words is "twenty million, five hundred sixty-seven thousand, eight hundred seventy-nine".