21145483 has 2 divisors, whose sum is σ = 21145484. Its totient is φ = 21145482.

The previous prime is 21145471. The next prime is 21145489. The reversal of 21145483 is 38454112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21145483 - 2⁵ = 21145451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21145489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572741 + 10572742.

It is an arithmetic number, because the mean of its divisors is an integer number (10572742).

Almost surely, 2^21145483 is an apocalyptic number.

21145483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21145483 is an equidigital number, since it uses as much as digits as its factorization.

21145483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 28.

The square root of 21145483 is about 4598.4217944856. The cubic root of 21145483 is about 276.5280576960.

Adding to 21145483 its reverse (38454112), we get a palindrome (59599595).

The spelling of 21145483 in words is "twenty-one million, one hundred forty-five thousand, four hundred eighty-three".