20439042 has 32 divisors (see below), whose sum is σ = 45940608. Its totient is φ = 6014976.

The previous prime is 20439017. The next prime is 20439043. The reversal of 20439042 is 24093402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20439043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3903 + ... + 7490.

It is an arithmetic number, because the mean of its divisors is an integer number (1435644).

Almost surely, 2^20439042 is an apocalyptic number.

20439042 is an abundant number, since it is smaller than the sum of its proper divisors (25501566).

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

20439042 is a wasteful number, since it uses less digits than its factorization.

20439042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11434.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20439042 is about 4520.9558723792. The cubic root of 20439042 is about 273.4136412184.

The spelling of 20439042 in words is "twenty million, four hundred thirty-nine thousand, forty-two".