21827736160 has 96 divisors (see below), whose sum is σ = 54831530880. Its totient is φ = 8182874112.

The previous prime is 21827736157. The next prime is 21827736173. The reversal of 21827736160 is 6163772812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633292 + ... + 666868.

It is an arithmetic number, because the mean of its divisors is an integer number (571161780).

Almost surely, 2^21827736160 is an apocalyptic number.

21827736160 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 21827736160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27415765440).

21827736160 is an abundant number, since it is smaller than the sum of its proper divisors (33003794720).

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

21827736160 is a wasteful number, since it uses less digits than its factorization.

21827736160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33848 (or 33840 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 21827736160 in words is "twenty-one billion, eight hundred twenty-seven million, seven hundred thirty-six thousand, one hundred sixty".