20240240455 has 4 divisors (see below), whose sum is σ = 24288288552. Its totient is φ = 16192192360.

The previous prime is 20240240401. The next prime is 20240240459. The reversal of 20240240455 is 55404204202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55404204202 = 2 ⋅27702102101.

It is a de Polignac number, because none of the positive numbers 2^k-20240240455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20240240459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024024041 + ... + 2024024050.

It is an arithmetic number, because the mean of its divisors is an integer number (6072072138).

Almost surely, 2^20240240455 is an apocalyptic number.

20240240455 is a deficient number, since it is larger than the sum of its proper divisors (4048048097).

20240240455 is an equidigital number, since it uses as much as digits as its factorization.

20240240455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048048096.

The product of its (nonzero) digits is 12800, while the sum is 28.

Adding to 20240240455 its reverse (55404204202), we get a palindrome (75644444657).

The spelling of 20240240455 in words is "twenty billion, two hundred forty million, two hundred forty thousand, four hundred fifty-five".