20590737979 has 4 divisors (see below), whose sum is σ = 23532271984. Its totient is φ = 17649203976.

The previous prime is 20590737967. The next prime is 20590737989. The reversal of 20590737979 is 97973709502.

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

It is a cyclic number.

It is not a de Polignac number, because 20590737979 - 2⁷ = 20590737851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20590737989) 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, 1470766992 + ... + 1470767005.

It is an arithmetic number, because the mean of its divisors is an integer number (5883067996).

Almost surely, 2^20590737979 is an apocalyptic number.

20590737979 is a deficient number, since it is larger than the sum of its proper divisors (2941534005).

20590737979 is an equidigital number, since it uses as much as digits as its factorization.

20590737979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941534004.

The product of its (nonzero) digits is 7501410, while the sum is 58.

The spelling of 20590737979 in words is "twenty billion, five hundred ninety million, seven hundred thirty-seven thousand, nine hundred seventy-nine".