22991194 has 4 divisors (see below), whose sum is σ = 34486794. Its totient is φ = 11495596.

The previous prime is 22991173. The next prime is 22991207. The reversal of 22991194 is 49119922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49119922 = 2 ⋅24559961.

It can be written as a sum of positive squares in only one way, i.e., 18173169 + 4818025 = 4263^2 + 2195^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5747797 + ... + 5747800.

Almost surely, 2^22991194 is an apocalyptic number.

22991194 is a deficient number, since it is larger than the sum of its proper divisors (11495600).

22991194 is a wasteful number, since it uses less digits than its factorization.

22991194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495599.

The product of its digits is 11664, while the sum is 37.

The square root of 22991194 is about 4794.9133464537. The cubic root of 22991194 is about 284.3503990150.

The spelling of 22991194 in words is "twenty-two million, nine hundred ninety-one thousand, one hundred ninety-four".