20339442 has 18 divisors (see below), whose sum is σ = 44110287. Its totient is φ = 6773436.

The previous prime is 20339401. The next prime is 20339447. The reversal of 20339442 is 24493302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10169721 + 10169721 = 3189^2 + 3189^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3189.

It is not an unprimeable number, because it can be changed into a prime (20339447) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18603 + ... + 19665.

Almost surely, 2^20339442 is an apocalyptic number.

20339442 is an abundant number, since it is smaller than the sum of its proper divisors (23770845).

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

20339442 is an equidigital number, since it uses as much as digits as its factorization.

20339442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134 (or 1068 counting only the distinct ones).

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

The square root of 20339442 is about 4509.9270504078. The cubic root of 20339442 is about 272.9688005242.

The spelling of 20339442 in words is "twenty million, three hundred thirty-nine thousand, four hundred forty-two".