20023404 has 12 divisors (see below), whose sum is σ = 46721304. Its totient is φ = 6674464.

The previous prime is 20023403. The next prime is 20023411. The reversal of 20023404 is 40432002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20023403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 834297 + ... + 834320.

It is an arithmetic number, because the mean of its divisors is an integer number (3893442).

Almost surely, 2^20023404 is an apocalyptic number.

It is an amenable number.

20023404 is an abundant number, since it is smaller than the sum of its proper divisors (26697900).

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

20023404 is a wasteful number, since it uses less digits than its factorization.

20023404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668624 (or 1668622 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 20023404 is about 4474.7518366944. The cubic root of 20023404 is about 271.5476007691.

Adding to 20023404 its reverse (40432002), we get a palindrome (60455406).

The spelling of 20023404 in words is "twenty million, twenty-three thousand, four hundred four".