20223018 has 12 divisors (see below), whose sum is σ = 43816578. Its totient is φ = 6741000.

The previous prime is 20222987. The next prime is 20223023. The reversal of 20223018 is 81032202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20223009 + 9 = 4497^2 + 3^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1123501 = 20223018 / (2 + 0 + 2 + 2 + 3 + 0 + 1 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561733 + ... + 561768.

Almost surely, 2^20223018 is an apocalyptic number.

20223018 is an abundant number, since it is smaller than the sum of its proper divisors (23593560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20223018 is a wasteful number, since it uses less digits than its factorization.

20223018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123509 (or 1123506 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20223018 is about 4497.0010006670. The cubic root of 20223018 is about 272.4469745042.

It can be divided in two parts, 202 and 23018, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 20223018 in words is "twenty million, two hundred twenty-three thousand, eighteen".