21842667660 has 96 divisors (see below), whose sum is σ = 66762807552. Its totient is φ = 5291749120.

The previous prime is 21842667589. The next prime is 21842667701. The reversal of 21842667660 is 6676624812.

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, 1090294 + ... + 1110146.

It is an arithmetic number, because the mean of its divisors is an integer number (695445912).

Almost surely, 2^21842667660 is an apocalyptic number.

21842667660 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 21842667660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33381403776).

21842667660 is an abundant number, since it is smaller than the sum of its proper divisors (44920139892).

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

21842667660 is a wasteful number, since it uses less digits than its factorization.

21842667660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21543 (or 21541 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 21842667660 in words is "twenty-one billion, eight hundred forty-two million, six hundred sixty-seven thousand, six hundred sixty".