20235829 has 2 divisors, whose sum is σ = 20235830. Its totient is φ = 20235828.

The previous prime is 20235827. The next prime is 20235833. The reversal of 20235829 is 92853202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18722929 + 1512900 = 4327^2 + 1230^2 .

It is a cyclic number.

It is not a de Polignac number, because 20235829 - 2¹ = 20235827 is a prime.

Together with 20235827, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20235829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20235821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10117914 + 10117915.

It is an arithmetic number, because the mean of its divisors is an integer number (10117915).

Almost surely, 2^20235829 is an apocalyptic number.

It is an amenable number.

20235829 is a deficient number, since it is larger than the sum of its proper divisors (1).

20235829 is an equidigital number, since it uses as much as digits as its factorization.

20235829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20235829 is about 4498.4251688785. The cubic root of 20235829 is about 272.5044928137.

The spelling of 20235829 in words is "twenty million, two hundred thirty-five thousand, eight hundred twenty-nine".