20084018 has 4 divisors (see below), whose sum is σ = 30126030. Its totient is φ = 10042008.

The previous prime is 20084017. The next prime is 20084027. The reversal of 20084018 is 81048002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 165649 = 4463^2 + 407^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20083984 and 20084002.

It is not an unprimeable number, because it can be changed into a prime (20084011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5021003 + ... + 5021006.

Almost surely, 2^20084018 is an apocalyptic number.

20084018 is a deficient number, since it is larger than the sum of its proper divisors (10042012).

20084018 is a wasteful number, since it uses less digits than its factorization.

20084018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10042011.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 20084018 is about 4481.5196083472. The cubic root of 20084018 is about 271.8213305432.

The spelling of 20084018 in words is "twenty million, eighty-four thousand, eighteen".