20240456 has 16 divisors (see below), whose sum is σ = 38759040. Its totient is φ = 9904720.

The previous prime is 20240449. The next prime is 20240459. The reversal of 20240456 is 65404202.

It is not an unprimeable number, because it can be changed into a prime (20240459) 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, 26540 + ... + 27291.

It is an arithmetic number, because the mean of its divisors is an integer number (2422440).

Almost surely, 2^20240456 is an apocalyptic number.

It is an amenable number.

20240456 is a deficient number, since it is larger than the sum of its proper divisors (18518584).

20240456 is a wasteful number, since it uses less digits than its factorization.

20240456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53884 (or 53880 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20240456 is about 4498.9394305769. The cubic root of 20240456 is about 272.5252609638.

Adding to 20240456 its reverse (65404202), we get a palindrome (85644658).

The spelling of 20240456 in words is "twenty million, two hundred forty thousand, four hundred fifty-six".