21874798824 has 64 divisors (see below), whose sum is σ = 58053153600. Its totient is φ = 6844990464.

The previous prime is 21874798789. The next prime is 21874798849. The reversal of 21874798824 is 42889747812.

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 15 ways as a sum of consecutive naturals, for example, 89799 + ... + 227625.

It is an arithmetic number, because the mean of its divisors is an integer number (907080525).

Almost surely, 2^21874798824 is an apocalyptic number.

21874798824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21874798824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29026576800).

21874798824 is an abundant number, since it is smaller than the sum of its proper divisors (36178354776).

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

21874798824 is a wasteful number, since it uses less digits than its factorization.

21874798824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138242 (or 138238 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 60.

The spelling of 21874798824 in words is "twenty-one billion, eight hundred seventy-four million, seven hundred ninety-eight thousand, eight hundred twenty-four".