20223594 has 40 divisors (see below), whose sum is σ = 46789248. Its totient is φ = 6522120.

The previous prime is 20223551. The next prime is 20223611. The reversal of 20223594 is 49532202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3009 + ... + 7035.

Almost surely, 2^20223594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20223594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23394624).

20223594 is an abundant number, since it is smaller than the sum of its proper divisors (26565654).

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

20223594 is a wasteful number, since it uses less digits than its factorization.

20223594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072 (or 4063 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20223594 is about 4497.0650428919. The cubic root of 20223594 is about 272.4495611271.

Adding to 20223594 its reverse (49532202), we get a palindrome (69755796).

The spelling of 20223594 in words is "twenty million, two hundred twenty-three thousand, five hundred ninety-four".