21300134 has 4 divisors (see below), whose sum is σ = 31950204. Its totient is φ = 10650066.

The previous prime is 21300127. The next prime is 21300137. The reversal of 21300134 is 43100312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5325032 + ... + 5325035.

It is an arithmetic number, because the mean of its divisors is an integer number (7987551).

Almost surely, 2^21300134 is an apocalyptic number.

21300134 is a deficient number, since it is larger than the sum of its proper divisors (10650070).

21300134 is a wasteful number, since it uses less digits than its factorization.

21300134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10650069.

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

The square root of 21300134 is about 4615.2068209345. The cubic root of 21300134 is about 277.2005654694.

Adding to 21300134 its reverse (43100312), we get a palindrome (64400446).

The spelling of 21300134 in words is "twenty-one million, three hundred thousand, one hundred thirty-four".