21160933 has 8 divisors (see below), whose sum is σ = 21621600. Its totient is φ = 20705328.

The previous prime is 21160913. The next prime is 21160949. The reversal of 21160933 is 33906112.

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 21160933 - 2⁵ = 21160901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21160898 and 21160907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21160913) 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 7 ways as a sum of consecutive naturals, for example, 7878 + ... + 10216.

It is an arithmetic number, because the mean of its divisors is an integer number (2702700).

Almost surely, 2^21160933 is an apocalyptic number.

It is an amenable number.

21160933 is a deficient number, since it is larger than the sum of its proper divisors (460667).

21160933 is a wasteful number, since it uses less digits than its factorization.

21160933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 21160933 is about 4600.1014119256. The cubic root of 21160933 is about 276.5953899387.

The spelling of 21160933 in words is "twenty-one million, one hundred sixty thousand, nine hundred thirty-three".