21346347 has 8 divisors (see below), whose sum is σ = 31049280. Its totient is φ = 12937160.

The previous prime is 21346343. The next prime is 21346357. The reversal of 21346347 is 74364312.

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

It is a cyclic number.

It is not a de Polignac number, because 21346347 - 2² = 21346343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21346343) 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, 323397 + ... + 323462.

It is an arithmetic number, because the mean of its divisors is an integer number (3881160).

Almost surely, 2^21346347 is an apocalyptic number.

21346347 is a deficient number, since it is larger than the sum of its proper divisors (9702933).

21346347 is a wasteful number, since it uses less digits than its factorization.

21346347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646873.

The product of its digits is 12096, while the sum is 30.

The square root of 21346347 is about 4620.2107094807. The cubic root of 21346347 is about 277.4008931050.

The spelling of 21346347 in words is "twenty-one million, three hundred forty-six thousand, three hundred forty-seven".