18695884950 has 36 divisors (see below), whose sum is σ = 50229612108. Its totient is φ = 4985569200.

The previous prime is 18695884901. The next prime is 18695884967. The reversal of 18695884950 is 5948859681.

18695884950 is a `hidden beast` number, since 1 + 8 + 6 + 9 + 588 + 49 + 5 + 0 = 666.

It is a super-2 number, since 2×18695884950² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 20772756 + ... + 20773655.

It is an arithmetic number, because the mean of its divisors is an integer number (1395267003).

Almost surely, 2^18695884950 is an apocalyptic number.

18695884950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18695884950 is an abundant number, since it is smaller than the sum of its proper divisors (31533727158).

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

18695884950 is a wasteful number, since it uses less digits than its factorization.

18695884950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41546429 (or 41546421 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 18695884950 in words is "eighteen billion, six hundred ninety-five million, eight hundred eighty-four thousand, nine hundred fifty".