21134146 has 8 divisors (see below), whose sum is σ = 34583184. Its totient is φ = 9606420.

The previous prime is 21134143. The next prime is 21134173. The reversal of 21134146 is 64143112.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 960643 = 21134146 / (2 + 1 + 1 + 3 + 4 + 1 + 4 + 6).

It is not an unprimeable number, because it can be changed into a prime (21134143) 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 3 ways as a sum of consecutive naturals, for example, 480300 + ... + 480343.

It is an arithmetic number, because the mean of its divisors is an integer number (4322898).

Almost surely, 2^21134146 is an apocalyptic number.

21134146 is a deficient number, since it is larger than the sum of its proper divisors (13449038).

21134146 is a wasteful number, since it uses less digits than its factorization.

21134146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960656.

The product of its digits is 576, while the sum is 22.

The square root of 21134146 is about 4597.1889236793. The cubic root of 21134146 is about 276.4786293457.

Adding to 21134146 its reverse (64143112), we get a palindrome (85277258).

The spelling of 21134146 in words is "twenty-one million, one hundred thirty-four thousand, one hundred forty-six".