21346316 has 6 divisors (see below), whose sum is σ = 37356060. Its totient is φ = 10673156.

The previous prime is 21346313. The next prime is 21346343. The reversal of 21346316 is 61364312.

It is not an unprimeable number, because it can be changed into a prime (21346313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2668286 + ... + 2668293.

It is an arithmetic number, because the mean of its divisors is an integer number (6226010).

Almost surely, 2^21346316 is an apocalyptic number.

It is an amenable number.

21346316 is a deficient number, since it is larger than the sum of its proper divisors (16009744).

21346316 is a wasteful number, since it uses less digits than its factorization.

21346316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5336583 (or 5336581 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 21346316 is about 4620.2073546541. The cubic root of 21346316 is about 277.4007588208.

The spelling of 21346316 in words is "twenty-one million, three hundred forty-six thousand, three hundred sixteen".