18402659213 has 2 divisors, whose sum is σ = 18402659214. Its totient is φ = 18402659212.

The previous prime is 18402659207. The next prime is 18402659221. The reversal of 18402659213 is 31295620481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17592573769 + 810085444 = 132637^2 + 28462^2 .

It is a cyclic number.

It is not a de Polignac number, because 18402659213 - 2¹⁰ = 18402658189 is a prime.

It is a super-2 number, since 2×18402659213² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18402659203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9201329606 + 9201329607.

It is an arithmetic number, because the mean of its divisors is an integer number (9201329607).

Almost surely, 2^18402659213 is an apocalyptic number.

It is an amenable number.

18402659213 is a deficient number, since it is larger than the sum of its proper divisors (1).

18402659213 is an equidigital number, since it uses as much as digits as its factorization.

18402659213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 18402659213 in words is "eighteen billion, four hundred two million, six hundred fifty-nine thousand, two hundred thirteen".