20495383979 has 8 divisors (see below), whose sum is σ = 23572490208. Its totient is φ = 17455576320.

The previous prime is 20495383969. The next prime is 20495383981. The reversal of 20495383979 is 97938359402.

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

It is not a de Polignac number, because 20495383979 - 2⁴ = 20495383963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20495383969) 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, 9323462 + ... + 9325659.

It is an arithmetic number, because the mean of its divisors is an integer number (2946561276).

Almost surely, 2^20495383979 is an apocalyptic number.

20495383979 is a deficient number, since it is larger than the sum of its proper divisors (3077106229).

20495383979 is a wasteful number, since it uses less digits than its factorization.

20495383979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18649285.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 20495383979 in words is "twenty billion, four hundred ninety-five million, three hundred eighty-three thousand, nine hundred seventy-nine".