22157018 has 16 divisors (see below), whose sum is σ = 37898280. Its totient is φ = 9624576.

The previous prime is 22157011. The next prime is 22157053. The reversal of 22157018 is 81075122.

It can be written as a sum of positive squares in 4 ways, for example, as 21743569 + 413449 = 4663^2 + 643^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (22157011) 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, 24623 + ... + 25506.

Almost surely, 2^22157018 is an apocalyptic number.

22157018 is a deficient number, since it is larger than the sum of its proper divisors (15741262).

22157018 is a wasteful number, since it uses less digits than its factorization.

22157018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50161.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 22157018 is about 4707.1241751201. The cubic root of 22157018 is about 280.8689755285.

The spelling of 22157018 in words is "twenty-two million, one hundred fifty-seven thousand, eighteen".