18837533131 has 2 divisors, whose sum is σ = 18837533132. Its totient is φ = 18837533130.

The previous prime is 18837533101. The next prime is 18837533149. The reversal of 18837533131 is 13133573881.

It is a strong prime.

It is an emirp because it is prime and its reverse (13133573881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18837533131 is a prime.

It is a super-2 number, since 2×18837533131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18837533101) 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, 9418766565 + 9418766566.

It is an arithmetic number, because the mean of its divisors is an integer number (9418766566).

Almost surely, 2^18837533131 is an apocalyptic number.

18837533131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18837533131 is an equidigital number, since it uses as much as digits as its factorization.

18837533131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The spelling of 18837533131 in words is "eighteen billion, eight hundred thirty-seven million, five hundred thirty-three thousand, one hundred thirty-one".