22736642 has 4 divisors (see below), whose sum is σ = 34104966. Its totient is φ = 11368320.

The previous prime is 22736641. The next prime is 22736669. The reversal of 22736642 is 24663722.

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., 19456921 + 3279721 = 4411^2 + 1811^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22736599 and 22736608.

It is not an unprimeable number, because it can be changed into a prime (22736641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5684159 + ... + 5684162.

Almost surely, 2^22736642 is an apocalyptic number.

22736642 is a deficient number, since it is larger than the sum of its proper divisors (11368324).

22736642 is a wasteful number, since it uses less digits than its factorization.

22736642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11368323.

The product of its digits is 24192, while the sum is 32.

The square root of 22736642 is about 4768.2955025879. The cubic root of 22736642 is about 283.2970863281.

The spelling of 22736642 in words is "twenty-two million, seven hundred thirty-six thousand, six hundred forty-two".