22152018 has 24 divisors (see below), whose sum is σ = 51538032. Its totient is φ = 6329064.

The previous prime is 22152007. The next prime is 22152019. The reversal of 22152018 is 81025122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22151985 and 22152003.

It is not an unprimeable number, because it can be changed into a prime (22152019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37380 + ... + 37967.

It is an arithmetic number, because the mean of its divisors is an integer number (2147418).

Almost surely, 2^22152018 is an apocalyptic number.

22152018 is an abundant number, since it is smaller than the sum of its proper divisors (29386014).

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

22152018 is a wasteful number, since it uses less digits than its factorization.

22152018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75366 (or 75359 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 22152018 is about 4706.5930353070. The cubic root of 22152018 is about 280.8478467748.

The spelling of 22152018 in words is "twenty-two million, one hundred fifty-two thousand, eighteen".