21412970 has 8 divisors (see below), whose sum is σ = 38543364. Its totient is φ = 8565184.

The previous prime is 21412967. The next prime is 21412987. The reversal of 21412970 is 7921412.

It can be written as a sum of positive squares in 2 ways, for example, as 19704721 + 1708249 = 4439^2 + 1307^2 .

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

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, 1070639 + ... + 1070658.

Almost surely, 2^21412970 is an apocalyptic number.

21412970 is a deficient number, since it is larger than the sum of its proper divisors (17130394).

21412970 is a wasteful number, since it uses less digits than its factorization.

21412970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141304.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 21412970 is about 4627.4150451413. The cubic root of 21412970 is about 277.6891873344.

The spelling of 21412970 in words is "twenty-one million, four hundred twelve thousand, nine hundred seventy".