20442292 has 12 divisors (see below), whose sum is σ = 38525956. Its totient is φ = 9434880.

The previous prime is 20442281. The next prime is 20442293. The reversal of 20442292 is 29224402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5044516 + 15397776 = 2246^2 + 3924^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196509 + ... + 196612.

Almost surely, 2^20442292 is an apocalyptic number.

It is an amenable number.

20442292 is a deficient number, since it is larger than the sum of its proper divisors (18083664).

20442292 is a wasteful number, since it uses less digits than its factorization.

20442292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393138 (or 393136 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20442292 is about 4521.3152953538. The cubic root of 20442292 is about 273.4281322309.

Adding to 20442292 its reverse (29224402), we get a palindrome (49666694).

The spelling of 20442292 in words is "twenty million, four hundred forty-two thousand, two hundred ninety-two".