31884920269 has 2 divisors, whose sum is σ = 31884920270. Its totient is φ = 31884920268.

The previous prime is 31884920201. The next prime is 31884920339. The reversal of 31884920269 is 96202948813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23458598244 + 8426322025 = 153162^2 + 91795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31884920269 is a prime.

It is a super-2 number, since 2×31884920269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31884920069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15942460134 + 15942460135.

It is an arithmetic number, because the mean of its divisors is an integer number (15942460135).

Almost surely, 2^31884920269 is an apocalyptic number.

It is an amenable number.

31884920269 is a deficient number, since it is larger than the sum of its proper divisors (1).

31884920269 is an equidigital number, since it uses as much as digits as its factorization.

31884920269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 31884920269 in words is "thirty-one billion, eight hundred eighty-four million, nine hundred twenty thousand, two hundred sixty-nine".