20042818 has 8 divisors (see below), whose sum is σ = 30088080. Its totient is φ = 10013460.

The previous prime is 20042801. The next prime is 20042837. The reversal of 20042818 is 81824002.

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

It is a super-2 number, since 2×20042818² = 803429106762248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20042792 and 20042801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48 + ... + 6331.

It is an arithmetic number, because the mean of its divisors is an integer number (3761010).

Almost surely, 2^20042818 is an apocalyptic number.

20042818 is a deficient number, since it is larger than the sum of its proper divisors (10045262).

20042818 is a wasteful number, since it uses less digits than its factorization.

20042818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7952.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 20042818 is about 4476.9205934437. The cubic root of 20042818 is about 271.6353334750.

The spelling of 20042818 in words is "twenty million, forty-two thousand, eight hundred eighteen".