20129733 has 12 divisors (see below), whose sum is σ = 31313100. Its totient is φ = 12387456.

The previous prime is 20129713. The next prime is 20129743. The reversal of 20129733 is 33792102.

It can be written as a sum of positive squares in 2 ways, for example, as 10131489 + 9998244 = 3183^2 + 3162^2 .

It is not a de Polignac number, because 20129733 - 2¹⁰ = 20128709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20129697 and 20129706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20129713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85908 + ... + 86141.

It is an arithmetic number, because the mean of its divisors is an integer number (2609425).

Almost surely, 2^20129733 is an apocalyptic number.

It is an amenable number.

20129733 is a deficient number, since it is larger than the sum of its proper divisors (11183367).

20129733 is a wasteful number, since it uses less digits than its factorization.

20129733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172068 (or 172065 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20129733 is about 4486.6170997757. The cubic root of 20129733 is about 272.0274130748.

The spelling of 20129733 in words is "twenty million, one hundred twenty-nine thousand, seven hundred thirty-three".