18229722 has 32 divisors (see below), whose sum is σ = 41864064. Its totient is φ = 5184000.

The previous prime is 18229709. The next prime is 18229723. The reversal of 18229722 is 22792281.

It is not an unprimeable number, because it can be changed into a prime (18229723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9222 + ... + 11022.

It is an arithmetic number, because the mean of its divisors is an integer number (1308252).

Almost surely, 2^18229722 is an apocalyptic number.

18229722 is an abundant number, since it is smaller than the sum of its proper divisors (23634342).

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

18229722 is a wasteful number, since it uses less digits than its factorization.

18229722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054.

The product of its digits is 8064, while the sum is 33.

The square root of 18229722 is about 4269.6278526354. The cubic root of 18229722 is about 263.1843223971.

The spelling of 18229722 in words is "eighteen million, two hundred twenty-nine thousand, seven hundred twenty-two".