20329933 has 8 divisors (see below), whose sum is σ = 21992600. Its totient is φ = 18681408.

The previous prime is 20329921. The next prime is 20329951. The reversal of 20329933 is 33992302.

It can be written as a sum of positive squares in 4 ways, for example, as 4313929 + 16016004 = 2077^2 + 4002^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20329933 - 2⁵ = 20329901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20329895 and 20329904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20329993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438 + ... + 6391.

It is an arithmetic number, because the mean of its divisors is an integer number (2749075).

Almost surely, 2^20329933 is an apocalyptic number.

It is an amenable number.

20329933 is a deficient number, since it is larger than the sum of its proper divisors (1662667).

20329933 is a wasteful number, since it uses less digits than its factorization.

20329933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 20329933 is about 4508.8726972493. The cubic root of 20329933 is about 272.9262548645.

The spelling of 20329933 in words is "twenty million, three hundred twenty-nine thousand, nine hundred thirty-three".