20464285979 has 2 divisors, whose sum is σ = 20464285980. Its totient is φ = 20464285978.

The previous prime is 20464285973. The next prime is 20464286033. The reversal of 20464285979 is 97958246402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20464285979 - 2¹² = 20464281883 is a prime.

It is not a weakly prime, because it can be changed into another prime (20464285973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232142989 + 10232142990.

It is an arithmetic number, because the mean of its divisors is an integer number (10232142990).

Almost surely, 2^20464285979 is an apocalyptic number.

20464285979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20464285979 is an equidigital number, since it uses as much as digits as its factorization.

20464285979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 20464285979 in words is "twenty billion, four hundred sixty-four million, two hundred eighty-five thousand, nine hundred seventy-nine".