20742041 has 2 divisors, whose sum is σ = 20742042. Its totient is φ = 20742040.

The previous prime is 20742031. The next prime is 20742077. The reversal of 20742041 is 14024702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 8386816 = 3515^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 20742041 - 2¹⁸ = 20479897 is a prime.

It is not a weakly prime, because it can be changed into another prime (20742031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10371020 + 10371021.

It is an arithmetic number, because the mean of its divisors is an integer number (10371021).

Almost surely, 2^20742041 is an apocalyptic number.

It is an amenable number.

20742041 is a deficient number, since it is larger than the sum of its proper divisors (1).

20742041 is an equidigital number, since it uses as much as digits as its factorization.

20742041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20742041 is about 4554.3430920386. The cubic root of 20742041 is about 274.7580947071.

Adding to 20742041 its reverse (14024702), we get a palindrome (34766743).

The spelling of 20742041 in words is "twenty million, seven hundred forty-two thousand, forty-one".