18158950 has 12 divisors (see below), whose sum is σ = 33775740. Its totient is φ = 7263560.

The previous prime is 18158929. The next prime is 18158951. The reversal of 18158950 is 5985181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18158951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181540 + ... + 181639.

It is an arithmetic number, because the mean of its divisors is an integer number (2814645).

Almost surely, 2^18158950 is an apocalyptic number.

18158950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18158950 is a deficient number, since it is larger than the sum of its proper divisors (15616790).

18158950 is a wasteful number, since it uses less digits than its factorization.

18158950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363191 (or 363186 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 18158950 is about 4261.3319513974. The cubic root of 18158950 is about 262.8432998887.

The spelling of 18158950 in words is "eighteen million, one hundred fifty-eight thousand, nine hundred fifty".