20302697879 has 4 divisors (see below), whose sum is σ = 20432014584. Its totient is φ = 20173381176.

The previous prime is 20302697869. The next prime is 20302697917. The reversal of 20302697879 is 97879620302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97879620302 = 2 ⋅48939810151.

It is a cyclic number.

It is not a de Polignac number, because 20302697879 - 2¹² = 20302693783 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20302697879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302697869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64658117 + ... + 64658430.

It is an arithmetic number, because the mean of its divisors is an integer number (5108003646).

Almost surely, 2^20302697879 is an apocalyptic number.

20302697879 is a deficient number, since it is larger than the sum of its proper divisors (129316705).

20302697879 is a wasteful number, since it uses less digits than its factorization.

20302697879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129316704.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 20302697879 in words is "twenty billion, three hundred two million, six hundred ninety-seven thousand, eight hundred seventy-nine".