21252483 has 32 divisors (see below), whose sum is σ = 37555200. Its totient is φ = 11613888.

The previous prime is 21252457. The next prime is 21252487. The reversal of 21252483 is 38425212.

It is not a de Polignac number, because 21252483 - 2¹³ = 21244291 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21252487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1903 + ... + 6791.

It is an arithmetic number, because the mean of its divisors is an integer number (1173600).

Almost surely, 2^21252483 is an apocalyptic number.

21252483 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21252483 is a deficient number, since it is larger than the sum of its proper divisors (16302717).

21252483 is a wasteful number, since it uses less digits than its factorization.

21252483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928 (or 4922 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 21252483 is about 4610.0415399430. The cubic root of 21252483 is about 276.9937006305.

Adding to 21252483 its reverse (38425212), we get a palindrome (59677695).

The spelling of 21252483 in words is "twenty-one million, two hundred fifty-two thousand, four hundred eighty-three".