18550442 has 8 divisors (see below), whose sum is σ = 27932256. Its totient is φ = 9239692.

The previous prime is 18550439. The next prime is 18550447. The reversal of 18550442 is 24405581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18550447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17108 + ... + 18159.

It is an arithmetic number, because the mean of its divisors is an integer number (3491532).

Almost surely, 2^18550442 is an apocalyptic number.

18550442 is a deficient number, since it is larger than the sum of its proper divisors (9381814).

18550442 is a wasteful number, since it uses less digits than its factorization.

18550442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35532.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 18550442 is about 4307.0224053283. The cubic root of 18550442 is about 264.7187808249.

The spelling of 18550442 in words is "eighteen million, five hundred fifty thousand, four hundred forty-two".