20023396 has 18 divisors (see below), whose sum is σ = 36214710. Its totient is φ = 9686880.

The previous prime is 20023391. The next prime is 20023403. The reversal of 20023396 is 69332002.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 96100 = 4464^2 + 310^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20023396.

It is not an unprimeable number, because it can be changed into a prime (20023391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1240 + ... + 6448.

Almost surely, 2^20023396 is an apocalyptic number.

It is an amenable number.

20023396 is a deficient number, since it is larger than the sum of its proper divisors (16191314).

20023396 is a wasteful number, since it uses less digits than its factorization.

20023396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275 (or 5242 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 20023396 is about 4474.7509427900. The cubic root of 20023396 is about 271.5475646050.

Adding to 20023396 its reverse (69332002), we get a palindrome (89355398).

The spelling of 20023396 in words is "twenty million, twenty-three thousand, three hundred ninety-six".