21454483 has 2 divisors, whose sum is σ = 21454484. Its totient is φ = 21454482.

The previous prime is 21454441. The next prime is 21454541. The reversal of 21454483 is 38445412.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21454483 is a prime.

It is not a weakly prime, because it can be changed into another prime (21451483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10727241 + 10727242.

It is an arithmetic number, because the mean of its divisors is an integer number (10727242).

Almost surely, 2^21454483 is an apocalyptic number.

21454483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21454483 is an equidigital number, since it uses as much as digits as its factorization.

21454483 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 31.

The square root of 21454483 is about 4631.8984228931. The cubic root of 21454483 is about 277.8685220976.

Adding to 21454483 its reverse (38445412), we get a palindrome (59899895).

The spelling of 21454483 in words is "twenty-one million, four hundred fifty-four thousand, four hundred eighty-three".