20304042 has 24 divisors (see below), whose sum is σ = 44636928. Its totient is φ = 6152520.

The previous prime is 20304029. The next prime is 20304049. The reversal of 20304042 is 24040302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20304049) 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, 13258 + ... + 14709.

It is an arithmetic number, because the mean of its divisors is an integer number (1859872).

Almost surely, 2^20304042 is an apocalyptic number.

20304042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20304042 is an abundant number, since it is smaller than the sum of its proper divisors (24332886).

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

20304042 is a wasteful number, since it uses less digits than its factorization.

20304042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27994 (or 27983 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20304042 is about 4506.0006657789. Note that the first 3 decimals coincide. The cubic root of 20304042 is about 272.8103447343.

Adding to 20304042 its reverse (24040302), we get a palindrome (44344344).

The spelling of 20304042 in words is "twenty million, three hundred four thousand, forty-two".