22423642 has 4 divisors (see below), whose sum is σ = 33635466. Its totient is φ = 11211820.

The previous prime is 22423613. The next prime is 22423649. The reversal of 22423642 is 24632422.

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., 21986721 + 436921 = 4689^2 + 661^2 .

It is not an unprimeable number, because it can be changed into a prime (22423649) 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, 5605909 + ... + 5605912.

Almost surely, 2^22423642 is an apocalyptic number.

22423642 is a deficient number, since it is larger than the sum of its proper divisors (11211824).

22423642 is a wasteful number, since it uses less digits than its factorization.

22423642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11211823.

The product of its digits is 4608, while the sum is 25.

The square root of 22423642 is about 4735.3608099067. The cubic root of 22423642 is about 281.9910883625.

The spelling of 22423642 in words is "twenty-two million, four hundred twenty-three thousand, six hundred forty-two".