21674246880 has 384 divisors, whose sum is σ = 83703352320. Its totient is φ = 4638965760.

The previous prime is 21674246851. The next prime is 21674246921. The reversal of 21674246880 is 8864247612.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1571856 + ... + 1585584.

It is an arithmetic number, because the mean of its divisors is an integer number (217977480).

Almost surely, 2^21674246880 is an apocalyptic number.

21674246880 is a gapful number since it is divisible by the number (20) 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 21674246880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41851676160).

21674246880 is an abundant number, since it is smaller than the sum of its proper divisors (62029105440).

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

21674246880 is a wasteful number, since it uses less digits than its factorization.

21674246880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13794 (or 13786 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 21674246880 in words is "twenty-one billion, six hundred seventy-four million, two hundred forty-six thousand, eight hundred eighty".