20023785829 has 2 divisors, whose sum is σ = 20023785830. Its totient is φ = 20023785828.

The previous prime is 20023785827. The next prime is 20023785833. The reversal of 20023785829 is 92858732002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19201644900 + 822140929 = 138570^2 + 28673^2 .

It is a cyclic number.

It is not a de Polignac number, because 20023785829 - 2¹ = 20023785827 is a prime.

It is a super-3 number, since 3×20023785829³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 20023785827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20023785823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011892914 + 10011892915.

It is an arithmetic number, because the mean of its divisors is an integer number (10011892915).

Almost surely, 2^20023785829 is an apocalyptic number.

It is an amenable number.

20023785829 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023785829 is an equidigital number, since it uses as much as digits as its factorization.

20023785829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 20023785829 in words is "twenty billion, twenty-three million, seven hundred eighty-five thousand, eight hundred twenty-nine".