19740811 has 2 divisors, whose sum is σ = 19740812. Its totient is φ = 19740810.

The previous prime is 19740797. The next prime is 19740817. The reversal of 19740811 is 11804791.

It is a strong prime.

It is an emirp because it is prime and its reverse (11804791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19740811 - 2¹⁷ = 19609739 is a prime.

It is not a weakly prime, because it can be changed into another prime (19740817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870405 + 9870406.

It is an arithmetic number, because the mean of its divisors is an integer number (9870406).

Almost surely, 2^19740811 is an apocalyptic number.

19740811 is a deficient number, since it is larger than the sum of its proper divisors (1).

19740811 is an equidigital number, since it uses as much as digits as its factorization.

19740811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 19740811 is about 4443.0632451047. The cubic root of 19740811 is about 270.2640809018.

The spelling of 19740811 in words is "nineteen million, seven hundred forty thousand, eight hundred eleven".