20223396 has 18 divisors (see below), whose sum is σ = 51120342. Its totient is φ = 6741120.

The previous prime is 20223389. The next prime is 20223403. The reversal of 20223396 is 69332202.

It is an interprime number because it is at equal distance from previous prime (20223389) and next prime (20223403).

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 509796 = 4440^2 + 714^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280845 + ... + 280916.

It is an arithmetic number, because the mean of its divisors is an integer number (2840019).

Almost surely, 2^20223396 is an apocalyptic number.

It is an amenable number.

20223396 is an abundant number, since it is smaller than the sum of its proper divisors (30896946).

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

20223396 is a wasteful number, since it uses less digits than its factorization.

20223396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561771 (or 561766 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20223396 is about 4497.0430284799. The cubic root of 20223396 is about 272.4486719810.

Adding to 20223396 its reverse (69332202), we get a palindrome (89555598).

The spelling of 20223396 in words is "twenty million, two hundred twenty-three thousand, three hundred ninety-six".