20788335831 has 4 divisors (see below), whose sum is σ = 27717781112. Its totient is φ = 13858890552.

The previous prime is 20788335829. The next prime is 20788335833. The reversal of 20788335831 is 13853388702.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20788335829) and next prime (20788335833).

It is not a de Polignac number, because 20788335831 - 2¹ = 20788335829 is a prime.

It is a super-2 number, since 2×20788335831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20788335833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3464722636 + ... + 3464722641.

It is an arithmetic number, because the mean of its divisors is an integer number (6929445278).

Almost surely, 2^20788335831 is an apocalyptic number.

20788335831 is a deficient number, since it is larger than the sum of its proper divisors (6929445281).

20788335831 is an equidigital number, since it uses as much as digits as its factorization.

20788335831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929445280.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 20788335831 in words is "twenty billion, seven hundred eighty-eight million, three hundred thirty-five thousand, eight hundred thirty-one".