20874611 has 2 divisors, whose sum is σ = 20874612. Its totient is φ = 20874610.

The previous prime is 20874571. The next prime is 20874643. The reversal of 20874611 is 11647802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20874611 - 2¹⁸ = 20612467 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20874661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10437305 + 10437306.

It is an arithmetic number, because the mean of its divisors is an integer number (10437306).

Almost surely, 2^20874611 is an apocalyptic number.

20874611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20874611 is an equidigital number, since it uses as much as digits as its factorization.

20874611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20874611 is about 4568.8741501600. The cubic root of 20874611 is about 275.3422119888.

The spelling of 20874611 in words is "twenty million, eight hundred seventy-four thousand, six hundred eleven".