20942133 has 4 divisors (see below), whose sum is σ = 27922848. Its totient is φ = 13961420.

The previous prime is 20942101. The next prime is 20942149. The reversal of 20942133 is 33124902.

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.

It is a cyclic number.

It is not a de Polignac number, because 20942133 - 2⁵ = 20942101 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20942183) 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, 3490353 + ... + 3490358.

It is an arithmetic number, because the mean of its divisors is an integer number (6980712).

Almost surely, 2^20942133 is an apocalyptic number.

It is an amenable number.

20942133 is a deficient number, since it is larger than the sum of its proper divisors (6980715).

20942133 is an equidigital number, since it uses as much as digits as its factorization.

20942133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6980714.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 20942133 is about 4576.2575320889. The cubic root of 20942133 is about 275.6387707601.

The spelling of 20942133 in words is "twenty million, nine hundred forty-two thousand, one hundred thirty-three".