31893120202423 has 2 divisors, whose sum is σ = 31893120202424. Its totient is φ = 31893120202422.

The previous prime is 31893120202421. The next prime is 31893120202477. The reversal of 31893120202423 is 32420202139813.

It is a weak prime.

It is an emirp because it is prime and its reverse (32420202139813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31893120202423 - 2¹ = 31893120202421 is a prime.

It is a super-2 number, since 2×31893120202423² (a number of 28 digits) contains 22 as substring.

Together with 31893120202421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31893120202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15946560101211 + 15946560101212.

It is an arithmetic number, because the mean of its divisors is an integer number (15946560101212).

Almost surely, 2^{31893120202423} is an apocalyptic number.

31893120202423 is a deficient number, since it is larger than the sum of its proper divisors (1).

31893120202423 is an equidigital number, since it uses as much as digits as its factorization.

31893120202423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 31893120202423 in words is "thirty-one trillion, eight hundred ninety-three billion, one hundred twenty million, two hundred two thousand, four hundred twenty-three".