20373581369 has 2 divisors, whose sum is σ = 20373581370. Its totient is φ = 20373581368.

The previous prime is 20373581359. The next prime is 20373581387. The reversal of 20373581369 is 96318537302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12728352400 + 7645228969 = 112820^2 + 87437^2 .

It is a cyclic number.

It is not a de Polignac number, because 20373581369 - 2⁴ = 20373581353 is a prime.

It is a super-2 number, since 2×20373581369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20373581359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10186790684 + 10186790685.

It is an arithmetic number, because the mean of its divisors is an integer number (10186790685).

Almost surely, 2^20373581369 is an apocalyptic number.

It is an amenable number.

20373581369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20373581369 is an equidigital number, since it uses as much as digits as its factorization.

20373581369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 20373581369 in words is "twenty billion, three hundred seventy-three million, five hundred eighty-one thousand, three hundred sixty-nine".