20313013979 has 2 divisors, whose sum is σ = 20313013980. Its totient is φ = 20313013978.

The previous prime is 20313013967. The next prime is 20313014063. The reversal of 20313013979 is 97931031302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20313013979 - 2⁸ = 20313013723 is a prime.

It is a super-2 number, since 2×20313013979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20313013909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156506989 + 10156506990.

It is an arithmetic number, because the mean of its divisors is an integer number (10156506990).

Almost surely, 2^20313013979 is an apocalyptic number.

20313013979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20313013979 is an equidigital number, since it uses as much as digits as its factorization.

20313013979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

The spelling of 20313013979 in words is "twenty billion, three hundred thirteen million, thirteen thousand, nine hundred seventy-nine".