18413653639 has 2 divisors, whose sum is σ = 18413653640. Its totient is φ = 18413653638.

The previous prime is 18413653627. The next prime is 18413653669. The reversal of 18413653639 is 93635631481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18413653639 - 2⁹ = 18413653127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18413653592 and 18413653601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18413653669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9206826819 + 9206826820.

It is an arithmetic number, because the mean of its divisors is an integer number (9206826820).

Almost surely, 2^18413653639 is an apocalyptic number.

18413653639 is a deficient number, since it is larger than the sum of its proper divisors (1).

18413653639 is an equidigital number, since it uses as much as digits as its factorization.

18413653639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The spelling of 18413653639 in words is "eighteen billion, four hundred thirteen million, six hundred fifty-three thousand, six hundred thirty-nine".