18209152636 has 6 divisors (see below), whose sum is σ = 31866017120. Its totient is φ = 9104576316.

The previous prime is 18209152627. The next prime is 18209152649. The reversal of 18209152636 is 63625190281.

It is a super-2 number, since 2×18209152636² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18209152592 and 18209152601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2276144076 + ... + 2276144083.

Almost surely, 2^18209152636 is an apocalyptic number.

It is an amenable number.

18209152636 is a deficient number, since it is larger than the sum of its proper divisors (13656864484).

18209152636 is a wasteful number, since it uses less digits than its factorization.

18209152636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552288163 (or 4552288161 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 18209152636 in words is "eighteen billion, two hundred nine million, one hundred fifty-two thousand, six hundred thirty-six".