22645642 has 4 divisors (see below), whose sum is σ = 33968466. Its totient is φ = 11322820.

The previous prime is 22645627. The next prime is 22645657. The reversal of 22645642 is 24654622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24654622 = 2 ⋅12327311.

It is an interprime number because it is at equal distance from previous prime (22645627) and next prime (22645657).

It can be written as a sum of positive squares in only one way, i.e., 16638241 + 6007401 = 4079^2 + 2451^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5661409 + ... + 5661412.

Almost surely, 2^22645642 is an apocalyptic number.

22645642 is a deficient number, since it is larger than the sum of its proper divisors (11322824).

22645642 is a wasteful number, since it uses less digits than its factorization.

22645642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11322823.

The product of its digits is 23040, while the sum is 31.

The square root of 22645642 is about 4758.7437417873. The cubic root of 22645642 is about 282.9186296045.

The spelling of 22645642 in words is "twenty-two million, six hundred forty-five thousand, six hundred forty-two".