20222018 has 8 divisors (see below), whose sum is σ = 30633660. Its totient is φ = 10010800.

The previous prime is 20222011. The next prime is 20222021. The reversal of 20222018 is 81022202.

It can be written as a sum of positive squares in 2 ways, for example, as 20187049 + 34969 = 4493^2 + 187^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 20221987 and 20222005.

It is not an unprimeable number, because it can be changed into a prime (20222011) 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, 49853 + ... + 50256.

Almost surely, 2^20222018 is an apocalyptic number.

20222018 is a deficient number, since it is larger than the sum of its proper divisors (10411642).

20222018 is a wasteful number, since it uses less digits than its factorization.

20222018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100212.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20222018 is about 4496.8898140826. The cubic root of 20222018 is about 272.4424837227.

The spelling of 20222018 in words is "twenty million, two hundred twenty-two thousand, eighteen".