20045842 has 8 divisors (see below), whose sum is σ = 30153600. Its totient is φ = 9994644.

The previous prime is 20045833. The next prime is 20045849. The reversal of 20045842 is 24854002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20045849) 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, 13242 + ... + 14677.

It is an arithmetic number, because the mean of its divisors is an integer number (3769200).

Almost surely, 2^20045842 is an apocalyptic number.

20045842 is a deficient number, since it is larger than the sum of its proper divisors (10107758).

20045842 is a wasteful number, since it uses less digits than its factorization.

20045842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28280.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 20045842 is about 4477.2583128517. The cubic root of 20045842 is about 271.6489939616.

Adding to 20045842 its reverse (24854002), we get a palindrome (44899844).

The spelling of 20045842 in words is "twenty million, forty-five thousand, eight hundred forty-two".