21460768 has 48 divisors (see below), whose sum is σ = 48686400. Its totient is φ = 9121536.

The previous prime is 21460727. The next prime is 21460787. The reversal of 21460768 is 86706412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33055 + ... + 33697.

It is an arithmetic number, because the mean of its divisors is an integer number (1014300).

Almost surely, 2^21460768 is an apocalyptic number.

21460768 is a gapful number since it is divisible by the number (28) 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 21460768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24343200).

21460768 is an abundant number, since it is smaller than the sum of its proper divisors (27225632).

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

21460768 is a wasteful number, since it uses less digits than its factorization.

21460768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 21460768 is about 4632.5768207338. The cubic root of 21460768 is about 277.8956529177.

The spelling of 21460768 in words is "twenty-one million, four hundred sixty thousand, seven hundred sixty-eight".