20418011 has 2 divisors, whose sum is σ = 20418012. Its totient is φ = 20418010.

The previous prime is 20417987. The next prime is 20418031. The reversal of 20418011 is 11081402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20418011 - 2¹⁰ = 20416987 is a prime.

It is a super-2 number, since 2×20418011² = 833790346392242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20418031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10209005 + 10209006.

It is an arithmetic number, because the mean of its divisors is an integer number (10209006).

Almost surely, 2^20418011 is an apocalyptic number.

20418011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20418011 is an equidigital number, since it uses as much as digits as its factorization.

20418011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 20418011 is about 4518.6293275727. The cubic root of 20418011 is about 273.3198316088.

Adding to 20418011 its reverse (11081402), we get a palindrome (31499413).

The spelling of 20418011 in words is "twenty million, four hundred eighteen thousand, eleven".