20442339 has 12 divisors (see below), whose sum is σ = 29608800. Its totient is φ = 13590864.

The previous prime is 20442293. The next prime is 20442349. The reversal of 20442339 is 93324402.

It is a happy number.

20442339 is a `hidden beast` number, since 204 + 423 + 39 = 666.

It is not a de Polignac number, because 20442339 - 2¹¹ = 20440291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 582 + ... + 6420.

It is an arithmetic number, because the mean of its divisors is an integer number (2467400).

Almost surely, 2^20442339 is an apocalyptic number.

20442339 is a deficient number, since it is larger than the sum of its proper divisors (9166461).

20442339 is a wasteful number, since it uses less digits than its factorization.

20442339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234 (or 6231 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20442339 is about 4521.3204929534. The cubic root of 20442339 is about 273.4283417820.

The spelling of 20442339 in words is "twenty million, four hundred forty-two thousand, three hundred thirty-nine".