18162922 has 4 divisors (see below), whose sum is σ = 27244386. Its totient is φ = 9081460.

The previous prime is 18162913. The next prime is 18162923. The reversal of 18162922 is 22926181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22926181 = 43 ⋅533167.

It can be written as a sum of positive squares in only one way, i.e., 14356521 + 3806401 = 3789^2 + 1951^2 .

It is a super-4 number, since 4×18162922⁴ (a number of 30 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18162923) by changing a digit.

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, 4540729 + ... + 4540732.

Almost surely, 2^18162922 is an apocalyptic number.

18162922 is a deficient number, since it is larger than the sum of its proper divisors (9081464).

18162922 is an equidigital number, since it uses as much as digits as its factorization.

18162922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9081463.

The product of its digits is 3456, while the sum is 31.

The square root of 18162922 is about 4261.7979773800. The cubic root of 18162922 is about 262.8624628447.

The spelling of 18162922 in words is "eighteen million, one hundred sixty-two thousand, nine hundred twenty-two".