22709642 has 4 divisors (see below), whose sum is σ = 34064466. Its totient is φ = 11354820.

The previous prime is 22709641. The next prime is 22709647. The reversal of 22709642 is 24690722.

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., 22572001 + 137641 = 4751^2 + 371^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22709599 and 22709608.

It is not an unprimeable number, because it can be changed into a prime (22709641) 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, 5677409 + ... + 5677412.

Almost surely, 2^22709642 is an apocalyptic number.

22709642 is a deficient number, since it is larger than the sum of its proper divisors (11354824).

22709642 is a wasteful number, since it uses less digits than its factorization.

22709642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11354823.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 22709642 is about 4765.4634611966. The cubic root of 22709642 is about 283.1849024930.

The spelling of 22709642 in words is "twenty-two million, seven hundred nine thousand, six hundred forty-two".