22135618 has 4 divisors (see below), whose sum is σ = 33203430. Its totient is φ = 11067808.

The previous prime is 22135579. The next prime is 22135639. The reversal of 22135618 is 81653122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19954089 + 2181529 = 4467^2 + 1477^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5533903 + ... + 5533906.

Almost surely, 2^22135618 is an apocalyptic number.

22135618 is a deficient number, since it is larger than the sum of its proper divisors (11067812).

22135618 is a wasteful number, since it uses less digits than its factorization.

22135618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11067811.

The product of its digits is 2880, while the sum is 28.

The square root of 22135618 is about 4704.8504758387. The cubic root of 22135618 is about 280.7785221382.

The spelling of 22135618 in words is "twenty-two million, one hundred thirty-five thousand, six hundred eighteen".