22164418 has 4 divisors (see below), whose sum is σ = 33246630. Its totient is φ = 11082208.

The previous prime is 22164409. The next prime is 22164449. The reversal of 22164418 is 81446122.

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., 20584369 + 1580049 = 4537^2 + 1257^2 .

It is a super-2 number, since 2×22164418² = 982522850557448, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5541103 + ... + 5541106.

Almost surely, 2^22164418 is an apocalyptic number.

22164418 is a deficient number, since it is larger than the sum of its proper divisors (11082212).

22164418 is a wasteful number, since it uses less digits than its factorization.

22164418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11082211.

The product of its digits is 3072, while the sum is 28.

The square root of 22164418 is about 4707.9101520738. The cubic root of 22164418 is about 280.9002402513.

The spelling of 22164418 in words is "twenty-two million, one hundred sixty-four thousand, four hundred eighteen".