20222918 has 8 divisors (see below), whose sum is σ = 31380480. Its totient is φ = 9762760.

The previous prime is 20222887. The next prime is 20222933. The reversal of 20222918 is 81922202.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174278 + ... + 174393.

It is an arithmetic number, because the mean of its divisors is an integer number (3922560).

Almost surely, 2^20222918 is an apocalyptic number.

20222918 is a deficient number, since it is larger than the sum of its proper divisors (11157562).

20222918 is a wasteful number, since it uses less digits than its factorization.

20222918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348702.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20222918 is about 4496.9898821323. The cubic root of 20222918 is about 272.4465254327.

The spelling of 20222918 in words is "twenty million, two hundred twenty-two thousand, nine hundred eighteen".