21283368 has 16 divisors (see below), whose sum is σ = 53208480. Its totient is φ = 7094448.

The previous prime is 21283351. The next prime is 21283397. The reversal of 21283368 is 86338212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443380 + ... + 443427.

It is an arithmetic number, because the mean of its divisors is an integer number (3325530).

Almost surely, 2^21283368 is an apocalyptic number.

It is an amenable number.

21283368 is an abundant number, since it is smaller than the sum of its proper divisors (31925112).

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

21283368 is a wasteful number, since it uses less digits than its factorization.

21283368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886816 (or 886812 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 21283368 is about 4613.3900767223. The cubic root of 21283368 is about 277.1278153070.

The spelling of 21283368 in words is "twenty-one million, two hundred eighty-three thousand, three hundred sixty-eight".