21034483 has 4 divisors (see below), whose sum is σ = 21759840. Its totient is φ = 20309128.

The previous prime is 21034471. The next prime is 21034513. The reversal of 21034483 is 38443012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21034483 - 2¹⁷ = 20903411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034183) 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, 362635 + ... + 362692.

It is an arithmetic number, because the mean of its divisors is an integer number (5439960).

Almost surely, 2^21034483 is an apocalyptic number.

21034483 is the 2452-nd centered heptagonal number.

21034483 is a deficient number, since it is larger than the sum of its proper divisors (725357).

21034483 is an equidigital number, since it uses as much as digits as its factorization.

21034483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725356.

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

The square root of 21034483 is about 4586.3365554656. The cubic root of 21034483 is about 276.0433445543.

Adding to 21034483 its reverse (38443012), we get a palindrome (59477495).

The spelling of 21034483 in words is "twenty-one million, thirty-four thousand, four hundred eighty-three".