20376641309 has 2 divisors, whose sum is σ = 20376641310. Its totient is φ = 20376641308.

The previous prime is 20376641293. The next prime is 20376641353. The reversal of 20376641309 is 90314667302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18888379225 + 1488262084 = 137435^2 + 38578^2 .

It is a cyclic number.

It is not a de Polignac number, because 20376641309 - 2⁴ = 20376641293 is a prime.

It is a super-2 number, since 2×20376641309² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20376641359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10188320654 + 10188320655.

It is an arithmetic number, because the mean of its divisors is an integer number (10188320655).

Almost surely, 2^20376641309 is an apocalyptic number.

It is an amenable number.

20376641309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20376641309 is an equidigital number, since it uses as much as digits as its factorization.

20376641309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 20376641309 in words is "twenty billion, three hundred seventy-six million, six hundred forty-one thousand, three hundred nine".