20906133 has 8 divisors (see below), whose sum is σ = 27981888. Its totient is φ = 13883904.

The previous prime is 20906111. The next prime is 20906143. The reversal of 20906133 is 33160902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20906133 - 2⁸ = 20905877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12460 + ... + 14037.

It is an arithmetic number, because the mean of its divisors is an integer number (3497736).

Almost surely, 2^20906133 is an apocalyptic number.

It is an amenable number.

20906133 is a deficient number, since it is larger than the sum of its proper divisors (7075755).

20906133 is a wasteful number, since it uses less digits than its factorization.

20906133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26763.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 20906133 is about 4572.3224951878. The cubic root of 20906133 is about 275.4807370785.

The spelling of 20906133 in words is "twenty million, nine hundred six thousand, one hundred thirty-three".