21706034 has 8 divisors (see below), whose sum is σ = 37210368. Its totient is φ = 9302580.

The previous prime is 21706033. The next prime is 21706067. The reversal of 21706034 is 43060712.

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

It is not an unprimeable number, because it can be changed into a prime (21706031) 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, 775202 + ... + 775229.

It is an arithmetic number, because the mean of its divisors is an integer number (4651296).

Almost surely, 2^21706034 is an apocalyptic number.

21706034 is a deficient number, since it is larger than the sum of its proper divisors (15504334).

21706034 is a wasteful number, since it uses less digits than its factorization.

21706034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550440.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21706034 is about 4658.9734920903. The cubic root of 21706034 is about 278.9502958266.

Adding to 21706034 its reverse (43060712), we get a palindrome (64766746).

The spelling of 21706034 in words is "twenty-one million, seven hundred six thousand, thirty-four".