21132033 has 16 divisors (see below), whose sum is σ = 30453696. Its totient is φ = 12957120.

The previous prime is 21132011. The next prime is 21132061. The reversal of 21132033 is 33023112.

It is not a de Polignac number, because 21132033 - 2¹⁰ = 21131009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21132233) 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, 12091 + ... + 13727.

It is an arithmetic number, because the mean of its divisors is an integer number (1903356).

Almost surely, 2^21132033 is an apocalyptic number.

It is an amenable number.

21132033 is a deficient number, since it is larger than the sum of its proper divisors (9321663).

21132033 is a wasteful number, since it uses less digits than its factorization.

21132033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 21132033 is about 4596.9591035814. The cubic root of 21132033 is about 276.4694148922.

Adding to 21132033 its reverse (33023112), we get a palindrome (54155145).

The spelling of 21132033 in words is "twenty-one million, one hundred thirty-two thousand, thirty-three".