20631933 has 12 divisors (see below), whose sum is σ = 34059168. Its totient is φ = 11789640.

The previous prime is 20631911. The next prime is 20631937. The reversal of 20631933 is 33913602.

20631933 is a `hidden beast` number, since 20 + 631 + 9 + 3 + 3 = 666.

It is not a de Polignac number, because 20631933 - 2⁶ = 20631869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20631897 and 20631906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163683 + ... + 163808.

It is an arithmetic number, because the mean of its divisors is an integer number (2838264).

Almost surely, 2^20631933 is an apocalyptic number.

It is an amenable number.

20631933 is a deficient number, since it is larger than the sum of its proper divisors (13427235).

20631933 is a wasteful number, since it uses less digits than its factorization.

20631933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327504 (or 327501 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 20631933 is about 4542.2387651906. The cubic root of 20631933 is about 274.2710523924.

The spelling of 20631933 in words is "twenty million, six hundred thirty-one thousand, nine hundred thirty-three".