20714128723 has 4 divisors (see below), whose sum is σ = 20719211040. Its totient is φ = 20709046408.

The previous prime is 20714128717. The next prime is 20714128727. The reversal of 20714128723 is 32782141702.

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 20714128723 - 2¹⁷ = 20713997651 is a prime.

It is a super-2 number, since 2×20714128723² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20714128727) 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, 2535040 + ... + 2543197.

It is an arithmetic number, because the mean of its divisors is an integer number (5179802760).

Almost surely, 2^20714128723 is an apocalyptic number.

20714128723 is a deficient number, since it is larger than the sum of its proper divisors (5082317).

20714128723 is an equidigital number, since it uses as much as digits as its factorization.

20714128723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082316.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 20714128723 in words is "twenty billion, seven hundred fourteen million, one hundred twenty-eight thousand, seven hundred twenty-three".