21300153 has 12 divisors (see below), whose sum is σ = 33037200. Its totient is φ = 12171432.

The previous prime is 21300143. The next prime is 21300173. The reversal of 21300153 is 35100312.

It is a happy number.

It is not a de Polignac number, because 21300153 - 2⁴ = 21300137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21300113) 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 11 ways as a sum of consecutive naturals, for example, 72303 + ... + 72596.

It is an arithmetic number, because the mean of its divisors is an integer number (2753100).

Almost surely, 2^21300153 is an apocalyptic number.

It is an amenable number.

21300153 is a deficient number, since it is larger than the sum of its proper divisors (11737047).

21300153 is a wasteful number, since it uses less digits than its factorization.

21300153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144916 (or 144909 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 21300153 is about 4615.2088793466. The cubic root of 21300153 is about 277.2006478916.

Adding to 21300153 its reverse (35100312), we get a palindrome (56400465).

The spelling of 21300153 in words is "twenty-one million, three hundred thousand, one hundred fifty-three".