20504842 has 8 divisors (see below), whose sum is σ = 30815136. Its totient is φ = 10233132.

The previous prime is 20504777. The next prime is 20504843. The reversal of 20504842 is 24840502.

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 (20504843) 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, 8278 + ... + 10465.

It is an arithmetic number, because the mean of its divisors is an integer number (3851892).

Almost surely, 2^20504842 is an apocalyptic number.

20504842 is a deficient number, since it is larger than the sum of its proper divisors (10310294).

20504842 is a wasteful number, since it uses less digits than its factorization.

20504842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19292.

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

The square root of 20504842 is about 4528.2272469478. The cubic root of 20504842 is about 273.7067297454.

The spelling of 20504842 in words is "twenty million, five hundred four thousand, eight hundred forty-two".