21634546024 has 128 divisors (see below), whose sum is σ = 51051571200. Its totient is φ = 8367701760.

The previous prime is 21634546019. The next prime is 21634546081. The reversal of 21634546024 is 42064543612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6778269 + ... + 6781459.

It is an arithmetic number, because the mean of its divisors is an integer number (398840400).

Almost surely, 2^21634546024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21634546024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25525785600).

21634546024 is an abundant number, since it is smaller than the sum of its proper divisors (29417025176).

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

21634546024 is a wasteful number, since it uses less digits than its factorization.

21634546024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423 (or 3419 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 21634546024 in words is "twenty-one billion, six hundred thirty-four million, five hundred forty-six thousand, twenty-four".