21704062 has 8 divisors (see below), whose sum is σ = 32616216. Its totient is φ = 10831992.

The previous prime is 21704029. The next prime is 21704069. The reversal of 21704062 is 26040712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21704069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8628 + ... + 10855.

It is an arithmetic number, because the mean of its divisors is an integer number (4077027).

Almost surely, 2^21704062 is an apocalyptic number.

21704062 is a deficient number, since it is larger than the sum of its proper divisors (10912154).

21704062 is a wasteful number, since it uses less digits than its factorization.

21704062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20042.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 21704062 is about 4658.7618526815. The cubic root of 21704062 is about 278.9418479968.

Adding to 21704062 its reverse (26040712), we get a palindrome (47744774).

The spelling of 21704062 in words is "twenty-one million, seven hundred four thousand, sixty-two".