21343468 has 12 divisors (see below), whose sum is σ = 37388512. Its totient is φ = 10661040.

The previous prime is 21343463. The next prime is 21343477. The reversal of 21343468 is 86434312.

It is not an unprimeable number, because it can be changed into a prime (21343463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3298 + ... + 7318.

Almost surely, 2^21343468 is an apocalyptic number.

It is an amenable number.

21343468 is a deficient number, since it is larger than the sum of its proper divisors (16045044).

21343468 is a wasteful number, since it uses less digits than its factorization.

21343468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352 (or 5350 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 21343468 is about 4619.8991330980. The cubic root of 21343468 is about 277.3884214461.

It can be divided in two parts, 213 and 43468, that added together give a square (43681 = 209²).

The spelling of 21343468 in words is "twenty-one million, three hundred forty-three thousand, four hundred sixty-eight".