23218190 has 16 divisors (see below), whose sum is σ = 43992720. Its totient is φ = 8798400.

The previous prime is 23218159. The next prime is 23218193. The reversal of 23218190 is 9181232.

It is a super-2 number, since 2×23218190² = 1078168693752200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23218193) 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, 60911 + ... + 61290.

It is an arithmetic number, because the mean of its divisors is an integer number (2749545).

Almost surely, 2^23218190 is an apocalyptic number.

23218190 is a deficient number, since it is larger than the sum of its proper divisors (20774530).

23218190 is a wasteful number, since it uses less digits than its factorization.

23218190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122227.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 23218190 is about 4818.5257081394. The cubic root of 23218190 is about 285.2831493953.

The spelling of 23218190 in words is "twenty-three million, two hundred eighteen thousand, one hundred ninety".