42018811 has 2 divisors, whose sum is σ = 42018812. Its totient is φ = 42018810.

The previous prime is 42018803. The next prime is 42018817. The reversal of 42018811 is 11881024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42018811 - 2³ = 42018803 is a prime.

It is not a weakly prime, because it can be changed into another prime (42018817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009405 + 21009406.

It is an arithmetic number, because the mean of its divisors is an integer number (21009406).

Almost surely, 2^42018811 is an apocalyptic number.

42018811 is a deficient number, since it is larger than the sum of its proper divisors (1).

42018811 is an equidigital number, since it uses as much as digits as its factorization.

42018811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 42018811 is about 6482.1918360999. The cubic root of 42018811 is about 347.6545516138.

Adding to 42018811 its reverse (11881024), we get a palindrome (53899835).

The spelling of 42018811 in words is "forty-two million, eighteen thousand, eight hundred eleven".