22018338 has 16 divisors (see below), whose sum is σ = 48929760. Its totient is φ = 7339428.

The previous prime is 22018309. The next prime is 22018343. The reversal of 22018338 is 83381022.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203820 + ... + 203927.

It is an arithmetic number, because the mean of its divisors is an integer number (3058110).

Almost surely, 2^22018338 is an apocalyptic number.

22018338 is an abundant number, since it is smaller than the sum of its proper divisors (26911422).

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

22018338 is a wasteful number, since it uses less digits than its factorization.

22018338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407758 (or 407752 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22018338 is about 4692.3701899999. The cubic root of 22018338 is about 280.2817656821.

The spelling of 22018338 in words is "twenty-two million, eighteen thousand, three hundred thirty-eight".