21452353 has 12 divisors (see below), whose sum is σ = 24243840. Its totient is φ = 18937776.

The previous prime is 21452339. The next prime is 21452357. The reversal of 21452353 is 35325412.

It is not a de Polignac number, because 21452353 - 2¹³ = 21444161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21452357) 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, 1128 + ... + 6646.

It is an arithmetic number, because the mean of its divisors is an integer number (2020320).

Almost surely, 2^21452353 is an apocalyptic number.

21452353 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21452353 is a deficient number, since it is larger than the sum of its proper divisors (2791487).

21452353 is a wasteful number, since it uses less digits than its factorization.

21452353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5568 (or 5555 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 21452353 is about 4631.6684898641. The cubic root of 21452353 is about 277.8593262023.

Adding to 21452353 its reverse (35325412), we get a palindrome (56777765).

The spelling of 21452353 in words is "twenty-one million, four hundred fifty-two thousand, three hundred fifty-three".