18572011 has 2 divisors, whose sum is σ = 18572012. Its totient is φ = 18572010.

The previous prime is 18571991. The next prime is 18572077. The reversal of 18572011 is 11027581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18572011 - 2⁵ = 18571979 is a prime.

It is not a weakly prime, because it can be changed into another prime (18572111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9286005 + 9286006.

It is an arithmetic number, because the mean of its divisors is an integer number (9286006).

Almost surely, 2^18572011 is an apocalyptic number.

18572011 is a deficient number, since it is larger than the sum of its proper divisors (1).

18572011 is an equidigital number, since it uses as much as digits as its factorization.

18572011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 18572011 is about 4309.5256119438. The cubic root of 18572011 is about 264.8213391696.

Adding to 18572011 its reverse (11027581), we get a palindrome (29599592).

The spelling of 18572011 in words is "eighteen million, five hundred seventy-two thousand, eleven".