21067346 has 8 divisors (see below), whose sum is σ = 32072880. Its totient is φ = 10376388.

The previous prime is 21067331. The next prime is 21067349. The reversal of 21067346 is 64376012.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21067349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78476 + ... + 78743.

It is an arithmetic number, because the mean of its divisors is an integer number (4009110).

Almost surely, 2^21067346 is an apocalyptic number.

21067346 is a deficient number, since it is larger than the sum of its proper divisors (11005534).

21067346 is a wasteful number, since it uses less digits than its factorization.

21067346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157288.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 21067346 is about 4589.9178641889. The cubic root of 21067346 is about 276.1870275441.

The spelling of 21067346 in words is "twenty-one million, sixty-seven thousand, three hundred forty-six".