22742132 has 24 divisors (see below), whose sum is σ = 45600576. Its totient is φ = 9721728.

The previous prime is 22742131. The next prime is 22742149. The reversal of 22742132 is 23124722.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22742098 and 22742107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742131) 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 in 7 ways as a sum of consecutive naturals, for example, 13868 + ... + 15420.

It is an arithmetic number, because the mean of its divisors is an integer number (1900024).

Almost surely, 2^22742132 is an apocalyptic number.

It is an amenable number.

22742132 is an abundant number, since it is smaller than the sum of its proper divisors (22858444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22742132 is a wasteful number, since it uses less digits than its factorization.

22742132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087 (or 2085 counting only the distinct ones).

The product of its digits is 1344, while the sum is 23.

The square root of 22742132 is about 4768.8711452502. The cubic root of 22742132 is about 283.3198861746.

Adding to 22742132 its reverse (23124722), we get a palindrome (45866854).

The spelling of 22742132 in words is "twenty-two million, seven hundred forty-two thousand, one hundred thirty-two".