21050024454 has 24 divisors (see below), whose sum is σ = 45611211672. Its totient is φ = 7016240160.

The previous prime is 21050024447. The next prime is 21050024483. The reversal of 21050024454 is 45442005012.

21050024454 is a `hidden beast` number, since 210 + 5 + 0 + 0 + 2 + 445 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412977 + ... + 461139.

It is an arithmetic number, because the mean of its divisors is an integer number (1900467153).

Almost surely, 2^21050024454 is an apocalyptic number.

21050024454 is an abundant number, since it is smaller than the sum of its proper divisors (24561187218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21050024454 is a wasteful number, since it uses less digits than its factorization.

21050024454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72452 (or 72449 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 21050024454 its reverse (45442005012), we get a palindrome (66492029466).

The spelling of 21050024454 in words is "twenty-one billion, fifty million, twenty-four thousand, four hundred fifty-four".