20590979 has 8 divisors (see below), whose sum is σ = 21222432. Its totient is φ = 19965760.

The previous prime is 20590967. The next prime is 20590991. The reversal of 20590979 is 97909502.

It is an interprime number because it is at equal distance from previous prime (20590967) and next prime (20590991).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20590979 - 2²⁰ = 19542403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20590919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5642 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (2652804).

Almost surely, 2^20590979 is an apocalyptic number.

20590979 is a deficient number, since it is larger than the sum of its proper divisors (631453).

20590979 is a wasteful number, since it uses less digits than its factorization.

20590979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117.

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

The square root of 20590979 is about 4537.7283964557. The cubic root of 20590979 is about 274.0894578874.

The spelling of 20590979 in words is "twenty million, five hundred ninety thousand, nine hundred seventy-nine".