20995079 has 6 divisors (see below), whose sum is σ = 24422904. Its totient is φ = 17995740.

The previous prime is 20995069. The next prime is 20995087. The reversal of 20995079 is 97059902.

It is not a de Polignac number, because 20995079 - 2⁴ = 20995063 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 (20995069) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214187 + ... + 214284.

It is an arithmetic number, because the mean of its divisors is an integer number (4070484).

Almost surely, 2^20995079 is an apocalyptic number.

20995079 is a deficient number, since it is larger than the sum of its proper divisors (3427825).

20995079 is an equidigital number, since it uses as much as digits as its factorization.

20995079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428485 (or 428478 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 20995079 is about 4582.0387383784. The cubic root of 20995079 is about 275.8708656913.

The spelling of 20995079 in words is "twenty million, nine hundred ninety-five thousand, seventy-nine".