21160433 has 16 divisors (see below), whose sum is σ = 25584000. Its totient is φ = 17096832.

The previous prime is 21160397. The next prime is 21160439. The reversal of 21160433 is 33406112.

It is a cyclic number.

It is not a de Polignac number, because 21160433 - 2⁸ = 21160177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21160439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51533 + ... + 51941.

It is an arithmetic number, because the mean of its divisors is an integer number (1599000).

Almost surely, 2^21160433 is an apocalyptic number.

It is an amenable number.

21160433 is a deficient number, since it is larger than the sum of its proper divisors (4423567).

21160433 is a wasteful number, since it uses less digits than its factorization.

21160433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 21160433 is about 4600.0470649766. The cubic root of 21160433 is about 276.5932114149.

Adding to 21160433 its reverse (33406112), we get a palindrome (54566545).

The spelling of 21160433 in words is "twenty-one million, one hundred sixty thousand, four hundred thirty-three".