20632133 has 4 divisors (see below), whose sum is σ = 20642688. Its totient is φ = 20621580.

The previous prime is 20632111. The next prime is 20632147. The reversal of 20632133 is 33123602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20632133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391 + ... + 6572.

It is an arithmetic number, because the mean of its divisors is an integer number (5160672).

Almost surely, 2^20632133 is an apocalyptic number.

It is an amenable number.

20632133 is a deficient number, since it is larger than the sum of its proper divisors (10555).

20632133 is an equidigital number, since it uses as much as digits as its factorization.

20632133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10554.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 20632133 is about 4542.2607807126. The cubic root of 20632133 is about 274.2719386243.

Adding to 20632133 its reverse (33123602), we get a palindrome (53755735).

The spelling of 20632133 in words is "twenty million, six hundred thirty-two thousand, one hundred thirty-three".