20680523733 has 12 divisors (see below), whose sum is σ = 28104124160. Its totient is φ = 13526877936.

The previous prime is 20680523729. The next prime is 20680523737. The reversal of 20680523733 is 33732508602.

It is an interprime number because it is at equal distance from previous prime (20680523729) and next prime (20680523737).

It is not a de Polignac number, because 20680523733 - 2² = 20680523729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20680523691 and 20680523700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20680523737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1218613 + ... + 1235466.

Almost surely, 2^20680523733 is an apocalyptic number.

It is an amenable number.

20680523733 is a deficient number, since it is larger than the sum of its proper divisors (7423600427).

20680523733 is an equidigital number, since it uses as much as digits as its factorization.

20680523733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454188 (or 2454135 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 20680523733 in words is "twenty billion, six hundred eighty million, five hundred twenty-three thousand, seven hundred thirty-three".