21484693 has 4 divisors (see below), whose sum is σ = 21498048. Its totient is φ = 21471340.

The previous prime is 21484681. The next prime is 21484699. The reversal of 21484693 is 39648412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21484693 - 2²¹ = 19387541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3871 + ... + 7612.

It is an arithmetic number, because the mean of its divisors is an integer number (5374512).

Almost surely, 2^21484693 is an apocalyptic number.

It is an amenable number.

21484693 is a deficient number, since it is larger than the sum of its proper divisors (13355).

21484693 is a wasteful number, since it uses less digits than its factorization.

21484693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13354.

The product of its digits is 41472, while the sum is 37.

The square root of 21484693 is about 4635.1583575969. The cubic root of 21484693 is about 277.9988829036.

The spelling of 21484693 in words is "twenty-one million, four hundred eighty-four thousand, six hundred ninety-three".