21160733 has 8 divisors (see below), whose sum is σ = 24442560. Its totient is φ = 18105280.

The previous prime is 21160721. The next prime is 21160747. The reversal of 21160733 is 33706112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21160733 - 2¹⁰ = 21159709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21160699 and 21160708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56393 + ... + 56766.

It is an arithmetic number, because the mean of its divisors is an integer number (3055320).

Almost surely, 2^21160733 is an apocalyptic number.

It is an amenable number.

21160733 is a deficient number, since it is larger than the sum of its proper divisors (3281827).

21160733 is a wasteful number, since it uses less digits than its factorization.

21160733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113187.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 21160733 is about 4600.0796732231. The cubic root of 21160733 is about 276.5945185333.

Adding to 21160733 its reverse (33706112), we get a palindrome (54866845).

The spelling of 21160733 in words is "twenty-one million, one hundred sixty thousand, seven hundred thirty-three".