20223618 has 16 divisors (see below), whose sum is σ = 40533696. Its totient is φ = 6726800.

The previous prime is 20223617. The next prime is 20223629. The reversal of 20223618 is 81632202.

It is not an unprimeable number, because it can be changed into a prime (20223611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333 + ... + 6368.

It is an arithmetic number, because the mean of its divisors is an integer number (2533356).

Almost surely, 2^20223618 is an apocalyptic number.

20223618 is an abundant number, since it is smaller than the sum of its proper divisors (20310078).

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

20223618 is a wasteful number, since it uses less digits than its factorization.

20223618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20223618 is about 4497.0677112981. The cubic root of 20223618 is about 272.4496689020.

The spelling of 20223618 in words is "twenty million, two hundred twenty-three thousand, six hundred eighteen".