21340483 has 4 divisors (see below), whose sum is σ = 21350088. Its totient is φ = 21330880.

The previous prime is 21340471. The next prime is 21340489. The reversal of 21340483 is 38404312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21340483 - 2⁹ = 21339971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21340489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (5337522).

Almost surely, 2^21340483 is an apocalyptic number.

21340483 is a deficient number, since it is larger than the sum of its proper divisors (9605).

21340483 is an equidigital number, since it uses as much as digits as its factorization.

21340483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9604.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 21340483 is about 4619.5760628006. The cubic root of 21340483 is about 277.3754894171.

Adding to 21340483 its reverse (38404312), we get a palindrome (59744795).

The spelling of 21340483 in words is "twenty-one million, three hundred forty thousand, four hundred eighty-three".