21114288 has 60 divisors (see below), whose sum is σ = 63641760. Its totient is φ = 6496128.

The previous prime is 21114283. The next prime is 21114293. The reversal of 21114288 is 88241112.

It is an interprime number because it is at equal distance from previous prime (21114283) and next prime (21114293).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21114283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3768 + ... + 7511.

It is an arithmetic number, because the mean of its divisors is an integer number (1060696).

Almost surely, 2^21114288 is an apocalyptic number.

It is an amenable number.

21114288 is an abundant number, since it is smaller than the sum of its proper divisors (42527472).

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

21114288 is a wasteful number, since it uses less digits than its factorization.

21114288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11306 (or 11297 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 21114288 is about 4595.0286179740. The cubic root of 21114288 is about 276.3920075486.

The spelling of 21114288 in words is "twenty-one million, one hundred fourteen thousand, two hundred eighty-eight".