21383346 has 16 divisors (see below), whose sum is σ = 42984000. Its totient is φ = 7091568.

The previous prime is 21383321. The next prime is 21383347. The reversal of 21383346 is 64338312.

It is not an unprimeable number, because it can be changed into a prime (21383347) 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, 7761 + ... + 10148.

It is an arithmetic number, because the mean of its divisors is an integer number (2686500).

Almost surely, 2^21383346 is an apocalyptic number.

21383346 is an abundant number, since it is smaller than the sum of its proper divisors (21600654).

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

21383346 is a wasteful number, since it uses less digits than its factorization.

21383346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18113.

The product of its digits is 10368, while the sum is 30.

The square root of 21383346 is about 4624.2130141247. The cubic root of 21383346 is about 277.5610708864.

The spelling of 21383346 in words is "twenty-one million, three hundred eighty-three thousand, three hundred forty-six".