21300452 has 12 divisors (see below), whose sum is σ = 37492476. Its totient is φ = 10588320.

The previous prime is 21300431. The next prime is 21300467. The reversal of 21300452 is 25400312.

It can be written as a sum of positive squares in 2 ways, for example, as 12503296 + 8797156 = 3536^2 + 2966^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21300452.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14699 + ... + 16082.

It is an arithmetic number, because the mean of its divisors is an integer number (3124373).

Almost surely, 2^21300452 is an apocalyptic number.

It is an amenable number.

21300452 is a deficient number, since it is larger than the sum of its proper divisors (16192024).

21300452 is a wasteful number, since it uses less digits than its factorization.

21300452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30958 (or 30956 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 21300452 is about 4615.2412721330. The cubic root of 21300452 is about 277.2019449496.

Adding to 21300452 its reverse (25400312), we get a palindrome (46700764).

The spelling of 21300452 in words is "twenty-one million, three hundred thousand, four hundred fifty-two".