21134170 has 8 divisors (see below), whose sum is σ = 38041524. Its totient is φ = 8453664.

The previous prime is 21134143. The next prime is 21134173. The reversal of 21134170 is 7143112.

It can be written as a sum of positive squares in 2 ways, for example, as 20912329 + 221841 = 4573^2 + 471^2 .

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 (21134173) by changing a digit.

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, 1056699 + ... + 1056718.

Almost surely, 2^21134170 is an apocalyptic number.

21134170 is a deficient number, since it is larger than the sum of its proper divisors (16907354).

21134170 is a wasteful number, since it uses less digits than its factorization.

21134170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113424.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 21134170 is about 4597.1915339694. The cubic root of 21134170 is about 276.4787340023.

Adding to 21134170 its reverse (7143112), we get a palindrome (28277282).

The spelling of 21134170 in words is "twenty-one million, one hundred thirty-four thousand, one hundred seventy".