20240455 has 16 divisors (see below), whose sum is σ = 25855200. Its totient is φ = 15158272.

The previous prime is 20240449. The next prime is 20240459. The reversal of 20240455 is 55404202.

It is a cyclic number.

It is not a de Polignac number, because 20240455 - 2⁷ = 20240327 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 18771 + ... + 19819.

It is an arithmetic number, because the mean of its divisors is an integer number (1615950).

Almost surely, 2^20240455 is an apocalyptic number.

20240455 is a deficient number, since it is larger than the sum of its proper divisors (5614745).

20240455 is a wasteful number, since it uses less digits than its factorization.

20240455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20240455 is about 4498.9393194396. The cubic root of 20240455 is about 272.5252564756.

Adding to 20240455 its reverse (55404202), we get a palindrome (75644657).

The spelling of 20240455 in words is "twenty million, two hundred forty thousand, four hundred fifty-five".