21134130 has 32 divisors (see below), whose sum is σ = 50846400. Its totient is φ = 5621952.

The previous prime is 21134123. The next prime is 21134143. The reversal of 21134130 is 3143112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19236 + ... + 20304.

It is an arithmetic number, because the mean of its divisors is an integer number (1588950).

Almost surely, 2^21134130 is an apocalyptic number.

21134130 is an abundant number, since it is smaller than the sum of its proper divisors (29712270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21134130 is a wasteful number, since it uses less digits than its factorization.

21134130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21134130 is about 4597.1871834851. The cubic root of 21134130 is about 276.4785595745.

Adding to 21134130 its reverse (3143112), we get a palindrome (24277242).

The spelling of 21134130 in words is "twenty-one million, one hundred thirty-four thousand, one hundred thirty".