22639142 has 4 divisors (see below), whose sum is σ = 33958716. Its totient is φ = 11319570.

The previous prime is 22639139. The next prime is 22639157. The reversal of 22639142 is 24193622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24193622 = 2 ⋅12096811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5659784 + ... + 5659787.

It is an arithmetic number, because the mean of its divisors is an integer number (8489679).

Almost surely, 2^22639142 is an apocalyptic number.

22639142 is a deficient number, since it is larger than the sum of its proper divisors (11319574).

22639142 is a wasteful number, since it uses less digits than its factorization.

22639142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11319573.

The product of its digits is 5184, while the sum is 29.

The square root of 22639142 is about 4758.0607394189. The cubic root of 22639142 is about 282.8915582138.

The spelling of 22639142 in words is "twenty-two million, six hundred thirty-nine thousand, one hundred forty-two".