21134510 has 8 divisors (see below), whose sum is σ = 38042136. Its totient is φ = 8453800.

The previous prime is 21134507. The next prime is 21134513. The reversal of 21134510 is 1543112.

It is an interprime number because it is at equal distance from previous prime (21134507) and next prime (21134513).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134513) 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, 1056716 + ... + 1056735.

It is an arithmetic number, because the mean of its divisors is an integer number (4755267).

Almost surely, 2^21134510 is an apocalyptic number.

21134510 is a deficient number, since it is larger than the sum of its proper divisors (16907626).

21134510 is a wasteful number, since it uses less digits than its factorization.

21134510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113458.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 21134510 is about 4597.2285129195. The cubic root of 21134510 is about 276.4802166291.

Adding to 21134510 its reverse (1543112), we get a palindrome (22677622).

The spelling of 21134510 in words is "twenty-one million, one hundred thirty-four thousand, five hundred ten".