18084901642631 has 2 divisors, whose sum is σ = 18084901642632. Its totient is φ = 18084901642630.

The previous prime is 18084901642567. The next prime is 18084901642733. The reversal of 18084901642631 is 13624610948081.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18084901642631 - 2⁶ = 18084901642567 is a prime.

It is a super-2 number, since 2×18084901642631² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18084901642531) 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, 9042450821315 + 9042450821316.

It is an arithmetic number, because the mean of its divisors is an integer number (9042450821316).

Almost surely, 2^{18084901642631} is an apocalyptic number.

18084901642631 is a deficient number, since it is larger than the sum of its proper divisors (1).

18084901642631 is an equidigital number, since it uses as much as digits as its factorization.

18084901642631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 18084901642631 in words is "eighteen trillion, eighty-four billion, nine hundred one million, six hundred forty-two thousand, six hundred thirty-one".