20454040550 has 24 divisors (see below), whose sum is σ = 40046860200. Its totient is φ = 7751004480.

The previous prime is 20454040543. The next prime is 20454040561. The reversal of 20454040550 is 5504045402.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10764335 + ... + 10766234.

It is an arithmetic number, because the mean of its divisors is an integer number (1668619175).

Almost surely, 2^20454040550 is an apocalyptic number.

20454040550 is a deficient number, since it is larger than the sum of its proper divisors (19592819650).

20454040550 is a wasteful number, since it uses less digits than its factorization.

20454040550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21530600 (or 21530595 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 29.

Adding to 20454040550 its reverse (5504045402), we get a palindrome (25958085952).

The spelling of 20454040550 in words is "twenty billion, four hundred fifty-four million, forty thousand, five hundred fifty".