20005726 has 16 divisors (see below), whose sum is σ = 33360768. Its totient is φ = 8935200.

The previous prime is 20005721. The next prime is 20005729. The reversal of 20005726 is 62750002.

It is a junction number, because it is equal to n+sod(n) for n = 20005697 and 20005706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11605 + ... + 13216.

It is an arithmetic number, because the mean of its divisors is an integer number (2085048).

Almost surely, 2^20005726 is an apocalyptic number.

20005726 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20005726 is a deficient number, since it is larger than the sum of its proper divisors (13355042).

20005726 is a wasteful number, since it uses less digits than its factorization.

20005726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24867.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20005726 is about 4472.7760954468. The cubic root of 20005726 is about 271.4676637798.

Adding to 20005726 its reverse (62750002), we get a palindrome (82755728).

The spelling of 20005726 in words is "twenty million, five thousand, seven hundred twenty-six".