20730606523 has 4 divisors (see below), whose sum is σ = 22615207128. Its totient is φ = 18846005920.

The previous prime is 20730606511. The next prime is 20730606553. The reversal of 20730606523 is 32560603702.

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

It is a cyclic number.

It is not a de Polignac number, because 20730606523 - 2²⁵ = 20697052091 is a prime.

It is a super-3 number, since 3×20730606523³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20730606553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942300286 + ... + 942300307.

It is an arithmetic number, because the mean of its divisors is an integer number (5653801782).

Almost surely, 2^20730606523 is an apocalyptic number.

20730606523 is a deficient number, since it is larger than the sum of its proper divisors (1884600605).

20730606523 is a wasteful number, since it uses less digits than its factorization.

20730606523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884600604.

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 20730606523 in words is "twenty billion, seven hundred thirty million, six hundred six thousand, five hundred twenty-three".