18208629957 has 12 divisors (see below), whose sum is σ = 28241956896. Its totient is φ = 10404931320.

The previous prime is 18208629919. The next prime is 18208629961. The reversal of 18208629957 is 75992680281.

It is a happy number.

It is not a de Polignac number, because 18208629957 - 2⁶ = 18208629893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18208629897 and 18208629906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18208629757) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61933969 + ... + 61934262.

It is an arithmetic number, because the mean of its divisors is an integer number (2353496408).

Almost surely, 2^18208629957 is an apocalyptic number.

It is an amenable number.

18208629957 is a deficient number, since it is larger than the sum of its proper divisors (10033326939).

18208629957 is a wasteful number, since it uses less digits than its factorization.

18208629957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123868248 (or 123868241 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 18208629957 in words is "eighteen billion, two hundred eight million, six hundred twenty-nine thousand, nine hundred fifty-seven".