21382346 has 8 divisors (see below), whose sum is σ = 32266080. Its totient is φ = 10626988.

The previous prime is 21382331. The next prime is 21382349. The reversal of 21382346 is 64328312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21382349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31676 + ... + 32343.

It is an arithmetic number, because the mean of its divisors is an integer number (4033260).

Almost surely, 2^21382346 is an apocalyptic number.

21382346 is a deficient number, since it is larger than the sum of its proper divisors (10883734).

21382346 is a wasteful number, since it uses less digits than its factorization.

21382346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64188.

The product of its digits is 6912, while the sum is 29.

The square root of 21382346 is about 4624.1048863537. The cubic root of 21382346 is about 277.5567440706.

The spelling of 21382346 in words is "twenty-one million, three hundred eighty-two thousand, three hundred forty-six".