18087831829 has 2 divisors, whose sum is σ = 18087831830. Its totient is φ = 18087831828.

The previous prime is 18087831823. The next prime is 18087831851. The reversal of 18087831829 is 92813878081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17878364100 + 209467729 = 133710^2 + 14473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18087831829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18087831829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18087831823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9043915914 + 9043915915.

It is an arithmetic number, because the mean of its divisors is an integer number (9043915915).

Almost surely, 2^18087831829 is an apocalyptic number.

It is an amenable number.

18087831829 is a deficient number, since it is larger than the sum of its proper divisors (1).

18087831829 is an equidigital number, since it uses as much as digits as its factorization.

18087831829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 55.

The spelling of 18087831829 in words is "eighteen billion, eighty-seven million, eight hundred thirty-one thousand, eight hundred twenty-nine".