21733713 has 12 divisors (see below), whose sum is σ = 31466448. Its totient is φ = 14455320.

The previous prime is 21733687. The next prime is 21733717. The reversal of 21733713 is 31733712.

It is not a de Polignac number, because 21733713 - 2⁵ = 21733681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21733717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1618 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (2622204).

Almost surely, 2^21733713 is an apocalyptic number.

It is an amenable number.

21733713 is a deficient number, since it is larger than the sum of its proper divisors (9732735).

21733713 is a wasteful number, since it uses less digits than its factorization.

21733713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5644 (or 5641 counting only the distinct ones).

The product of its digits is 2646, while the sum is 27.

The square root of 21733713 is about 4661.9430498452. The cubic root of 21733713 is about 279.0688156455.

Subtracting 21733713 from its reverse (31733712), we obtain a palindrome (9999999).

It can be divided in two parts, 2173 and 3713, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 21733713 in words is "twenty-one million, seven hundred thirty-three thousand, seven hundred thirteen".