39918334823 has 2 divisors, whose sum is σ = 39918334824. Its totient is φ = 39918334822.

The previous prime is 39918334801. The next prime is 39918334849. The reversal of 39918334823 is 32843381993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39918334823 - 2⁶ = 39918334759 is a prime.

It is a super-2 number, since 2×39918334823² (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 (39918334853) 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, 19959167411 + 19959167412.

It is an arithmetic number, because the mean of its divisors is an integer number (19959167412).

Almost surely, 2^39918334823 is an apocalyptic number.

39918334823 is a deficient number, since it is larger than the sum of its proper divisors (1).

39918334823 is an equidigital number, since it uses as much as digits as its factorization.

39918334823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 53.

The spelling of 39918334823 in words is "thirty-nine billion, nine hundred eighteen million, three hundred thirty-four thousand, eight hundred twenty-three".