18850818 has 16 divisors (see below), whose sum is σ = 43087680. Its totient is φ = 5385936.

The previous prime is 18850817. The next prime is 18850829. The reversal of 18850818 is 81805881.

It is not an unprimeable number, because it can be changed into a prime (18850817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224373 + ... + 224456.

It is an arithmetic number, because the mean of its divisors is an integer number (2692980).

Almost surely, 2^18850818 is an apocalyptic number.

18850818 is an abundant number, since it is smaller than the sum of its proper divisors (24236862).

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

18850818 is a wasteful number, since it uses less digits than its factorization.

18850818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448841.

The product of its (nonzero) digits is 20480, while the sum is 39.

The square root of 18850818 is about 4341.7528718249. The cubic root of 18850818 is about 266.1399474636.

The spelling of 18850818 in words is "eighteen million, eight hundred fifty thousand, eight hundred eighteen".