20718041 has 4 divisors (see below), whose sum is σ = 20742912. Its totient is φ = 20693172.

The previous prime is 20718031. The next prime is 20718073. The reversal of 20718041 is 14081702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20718041 - 2¹⁴ = 20701657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20717998 and 20718016.

It is not an unprimeable number, because it can be changed into a prime (20718011) 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, 11141 + ... + 12866.

It is an arithmetic number, because the mean of its divisors is an integer number (5185728).

Almost surely, 2^20718041 is an apocalyptic number.

It is an amenable number.

20718041 is a deficient number, since it is larger than the sum of its proper divisors (24871).

20718041 is an equidigital number, since it uses as much as digits as its factorization.

20718041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24870.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20718041 is about 4551.7074818138. The cubic root of 20718041 is about 274.6520823298.

Adding to 20718041 its reverse (14081702), we get a palindrome (34799743).

The spelling of 20718041 in words is "twenty million, seven hundred eighteen thousand, forty-one".