21707011 has 8 divisors (see below), whose sum is σ = 23243760. Its totient is φ = 20199168.

The previous prime is 21707003. The next prime is 21707041. The reversal of 21707011 is 11070712.

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

It is a cyclic number.

It is not a de Polignac number, because 21707011 - 2³ = 21707003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21707011.

It is not an unprimeable number, because it can be changed into a prime (21707041) 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 7 ways as a sum of consecutive naturals, for example, 5661 + ... + 8686.

It is an arithmetic number, because the mean of its divisors is an integer number (2905470).

Almost surely, 2^21707011 is an apocalyptic number.

21707011 is a deficient number, since it is larger than the sum of its proper divisors (1536749).

21707011 is a wasteful number, since it uses less digits than its factorization.

21707011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14453.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 21707011 is about 4659.0783423334. The cubic root of 21707011 is about 278.9544809969.

Adding to 21707011 its reverse (11070712), we get a palindrome (32777723).

The spelling of 21707011 in words is "twenty-one million, seven hundred seven thousand, eleven".