21417070 has 8 divisors (see below), whose sum is σ = 38550744. Its totient is φ = 8566824.

The previous prime is 21417031. The next prime is 21417089. The reversal of 21417070 is 7071412.

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

It is a congruent number.

It is an unprimeable number.

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, 1070844 + ... + 1070863.

It is an arithmetic number, because the mean of its divisors is an integer number (4818843).

Almost surely, 2^21417070 is an apocalyptic number.

21417070 is a deficient number, since it is larger than the sum of its proper divisors (17133674).

21417070 is a wasteful number, since it uses less digits than its factorization.

21417070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141714.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 21417070 is about 4627.8580358520. The cubic root of 21417070 is about 277.7069095064.

Adding to 21417070 its reverse (7071412), we get a palindrome (28488482).

The spelling of 21417070 in words is "twenty-one million, four hundred seventeen thousand, seventy".