21327888 has 40 divisors (see below), whose sum is σ = 55362528. Its totient is φ = 7075072.

The previous prime is 21327883. The next prime is 21327893. The reversal of 21327888 is 88872312.

It is an interprime number because it is at equal distance from previous prime (21327883) and next prime (21327893).

It is not an unprimeable number, because it can be changed into a prime (21327883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10231 + ... + 12137.

Almost surely, 2^21327888 is an apocalyptic number.

It is an amenable number.

21327888 is an abundant number, since it is smaller than the sum of its proper divisors (34034640).

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

21327888 is a wasteful number, since it uses less digits than its factorization.

21327888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151 (or 2145 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 21327888 is about 4618.2126412715. The cubic root of 21327888 is about 277.3209103369.

The spelling of 21327888 in words is "twenty-one million, three hundred twenty-seven thousand, eight hundred eighty-eight".