18505950 has 24 divisors (see below), whose sum is σ = 45895128. Its totient is φ = 4934880.

The previous prime is 18505939. The next prime is 18505969. The reversal of 18505950 is 5950581.

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 11 ways as a sum of consecutive naturals, for example, 61537 + ... + 61836.

It is an arithmetic number, because the mean of its divisors is an integer number (1912297).

Almost surely, 2^18505950 is an apocalyptic number.

18505950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18505950 is an abundant number, since it is smaller than the sum of its proper divisors (27389178).

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

18505950 is a wasteful number, since it uses less digits than its factorization.

18505950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123388 (or 123383 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 18505950 is about 4301.8542513665. The cubic root of 18505950 is about 264.5069746101.

The spelling of 18505950 in words is "eighteen million, five hundred five thousand, nine hundred fifty".