20144456 has 24 divisors (see below), whose sum is σ = 40127970. Its totient is φ = 9478656.

The previous prime is 20144437. The next prime is 20144461. The reversal of 20144456 is 65444102.

It can be written as a sum of positive squares in 3 ways, for example, as 19272100 + 872356 = 4390^2 + 934^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2045 + ... + 6668.

Almost surely, 2^20144456 is an apocalyptic number.

It is an amenable number.

20144456 is a deficient number, since it is larger than the sum of its proper divisors (19983514).

20144456 is a wasteful number, since it uses less digits than its factorization.

20144456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8753 (or 8732 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20144456 is about 4488.2575683666. The cubic root of 20144456 is about 272.0937177058.

Adding to 20144456 its reverse (65444102), we get a palindrome (85588558).

The spelling of 20144456 in words is "twenty million, one hundred forty-four thousand, four hundred fifty-six".