21422555452 has 24 divisors (see below), whose sum is σ = 38846931200. Its totient is φ = 10329739056.

The previous prime is 21422555431. The next prime is 21422555471. The reversal of 21422555452 is 25455522412.

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 7 ways as a sum of consecutive naturals, for example, 774702 + ... + 801877.

Almost surely, 2^21422555452 is an apocalyptic number.

It is an amenable number.

21422555452 is a deficient number, since it is larger than the sum of its proper divisors (17424375748).

21422555452 is a wasteful number, since it uses less digits than its factorization.

21422555452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576705 (or 1576703 counting only the distinct ones).

The product of its digits is 160000, while the sum is 37.

The spelling of 21422555452 in words is "twenty-one billion, four hundred twenty-two million, five hundred fifty-five thousand, four hundred fifty-two".