20444456 has 16 divisors (see below), whose sum is σ = 40351200. Its totient is φ = 9684144.

The previous prime is 20444429. The next prime is 20444471. The reversal of 20444456 is 65444402.

It is a happy number.

It is a super-2 number, since 2×20444456² = 835951562271872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67100 + ... + 67403.

It is an arithmetic number, because the mean of its divisors is an integer number (2521950).

Almost surely, 2^20444456 is an apocalyptic number.

It is an amenable number.

20444456 is a deficient number, since it is larger than the sum of its proper divisors (19906744).

20444456 is a wasteful number, since it uses less digits than its factorization.

20444456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134528 (or 134524 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 20444456 is about 4521.5545999136. The cubic root of 20444456 is about 273.4377801641.

Adding to 20444456 its reverse (65444402), we get a palindrome (85888858).

The spelling of 20444456 in words is "twenty million, four hundred forty-four thousand, four hundred fifty-six".