21134030 has 16 divisors (see below), whose sum is σ = 39070080. Its totient is φ = 8224992.

The previous prime is 21134021. The next prime is 21134063. The reversal of 21134030 is 3043112.

It is a junction number, because it is equal to n+sod(n) for n = 21133996 and 21134014.

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 7 ways as a sum of consecutive naturals, for example, 28190 + ... + 28929.

It is an arithmetic number, because the mean of its divisors is an integer number (2441880).

Almost surely, 2^21134030 is an apocalyptic number.

21134030 is a deficient number, since it is larger than the sum of its proper divisors (17936050).

21134030 is a wasteful number, since it uses less digits than its factorization.

21134030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57163.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 21134030 is about 4597.1763072564. The cubic root of 21134030 is about 276.4781235042.

Adding to 21134030 its reverse (3043112), we get a palindrome (24177142).

The spelling of 21134030 in words is "twenty-one million, one hundred thirty-four thousand, thirty".