20726141 has 4 divisors (see below), whose sum is σ = 20750652. Its totient is φ = 20701632.

The previous prime is 20726137. The next prime is 20726149. The reversal of 20726141 is 14162702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14162702 = 2 ⋅7081351.

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 2493241 = 4270^2 + 1579^2 .

It is a cyclic number.

It is not a de Polignac number, because 20726141 - 2² = 20726137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10940 + ... + 12693.

It is an arithmetic number, because the mean of its divisors is an integer number (5187663).

Almost surely, 2^20726141 is an apocalyptic number.

It is an amenable number.

20726141 is a deficient number, since it is larger than the sum of its proper divisors (24511).

20726141 is an equidigital number, since it uses as much as digits as its factorization.

20726141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24510.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20726141 is about 4552.5971708465. The cubic root of 20726141 is about 274.6878706557.

Adding to 20726141 its reverse (14162702), we get a palindrome (34888843).

The spelling of 20726141 in words is "twenty million, seven hundred twenty-six thousand, one hundred forty-one".