21343368 has 32 divisors (see below), whose sum is σ = 54266400. Its totient is φ = 6993408.

The previous prime is 21343363. The next prime is 21343373. The reversal of 21343368 is 86334312.

It is an interprime number because it is at equal distance from previous prime (21343363) and next prime (21343373).

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

It is not an unprimeable number, because it can be changed into a prime (21343363) 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, 6121 + ... + 8952.

It is an arithmetic number, because the mean of its divisors is an integer number (1695825).

Almost surely, 2^21343368 is an apocalyptic number.

It is an amenable number.

21343368 is an abundant number, since it is smaller than the sum of its proper divisors (32923032).

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

21343368 is a wasteful number, since it uses less digits than its factorization.

21343368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15141 (or 15137 counting only the distinct ones).

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

The square root of 21343368 is about 4619.8883103382. Note that the first 3 decimals coincide. The cubic root of 21343368 is about 277.3879882318.

The spelling of 21343368 in words is "twenty-one million, three hundred forty-three thousand, three hundred sixty-eight".