18635050686 has 16 divisors (see below), whose sum is σ = 42594401664. Its totient is φ = 5324300184.

The previous prime is 18635050673. The next prime is 18635050697. The reversal of 18635050686 is 68605053681.

It is a super-2 number, since 2×18635050686² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221845800 + ... + 221845883.

It is an arithmetic number, because the mean of its divisors is an integer number (2662150104).

Almost surely, 2^18635050686 is an apocalyptic number.

18635050686 is an abundant number, since it is smaller than the sum of its proper divisors (23959350978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18635050686 is a wasteful number, since it uses less digits than its factorization.

18635050686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443691695.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 18635050686 in words is "eighteen billion, six hundred thirty-five million, fifty thousand, six hundred eighty-six".