20741579 has 2 divisors, whose sum is σ = 20741580. Its totient is φ = 20741578.

The previous prime is 20741569. The next prime is 20741593. The reversal of 20741579 is 97514702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20741579 - 2⁸ = 20741323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20741569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10370789 + 10370790.

It is an arithmetic number, because the mean of its divisors is an integer number (10370790).

Almost surely, 2^20741579 is an apocalyptic number.

20741579 is a deficient number, since it is larger than the sum of its proper divisors (1).

20741579 is an equidigital number, since it uses as much as digits as its factorization.

20741579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 20741579 is about 4554.2923709397. The cubic root of 20741579 is about 274.7560547410.

The spelling of 20741579 in words is "twenty million, seven hundred forty-one thousand, five hundred seventy-nine".