20344131469 has 2 divisors, whose sum is σ = 20344131470. Its totient is φ = 20344131468.

The previous prime is 20344131377. The next prime is 20344131503. The reversal of 20344131469 is 96413144302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19912032100 + 432099369 = 141110^2 + 20787^2 .

It is a cyclic number.

It is not a de Polignac number, because 20344131469 - 2⁷ = 20344131341 is a prime.

It is a super-2 number, since 2×20344131469² (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 (20344132469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10172065734 + 10172065735.

It is an arithmetic number, because the mean of its divisors is an integer number (10172065735).

Almost surely, 2^20344131469 is an apocalyptic number.

It is an amenable number.

20344131469 is a deficient number, since it is larger than the sum of its proper divisors (1).

20344131469 is an equidigital number, since it uses as much as digits as its factorization.

20344131469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 20344131469 in words is "twenty billion, three hundred forty-four million, one hundred thirty-one thousand, four hundred sixty-nine".