21546426244 has 12 divisors (see below), whose sum is σ = 43092852544. Its totient is φ = 9234182664.

The previous prime is 21546426221. The next prime is 21546426277. The reversal of 21546426244 is 44262464512.

21546426244 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21546426197 and 21546426206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384757584 + ... + 384757639.

Almost surely, 2^21546426244 is an apocalyptic number.

It is an amenable number.

21546426244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21546426244 is a wasteful number, since it uses less digits than its factorization.

21546426244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769515234 (or 769515232 counting only the distinct ones).

The product of its digits is 368640, while the sum is 40.

The spelling of 21546426244 in words is "twenty-one billion, five hundred forty-six million, four hundred twenty-six thousand, two hundred forty-four".