20513269379 has 2 divisors, whose sum is σ = 20513269380. Its totient is φ = 20513269378.

The previous prime is 20513269373. The next prime is 20513269457. The reversal of 20513269379 is 97396231502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20513269379 - 2²⁸ = 20244833923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20513269373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256634689 + 10256634690.

It is an arithmetic number, because the mean of its divisors is an integer number (10256634690).

Almost surely, 2^20513269379 is an apocalyptic number.

20513269379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20513269379 is an equidigital number, since it uses as much as digits as its factorization.

20513269379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 47.

The spelling of 20513269379 in words is "twenty billion, five hundred thirteen million, two hundred sixty-nine thousand, three hundred seventy-nine".