18401011 has 8 divisors (see below), whose sum is σ = 19125248. Its totient is φ = 17685000.

The previous prime is 18400981. The next prime is 18401023. The reversal of 18401011 is 11010481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18401011 - 2⁷ = 18400883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18401041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2716 + ... + 6646.

It is an arithmetic number, because the mean of its divisors is an integer number (2390656).

Almost surely, 2^18401011 is an apocalyptic number.

18401011 is a deficient number, since it is larger than the sum of its proper divisors (724237).

18401011 is a wasteful number, since it uses less digits than its factorization.

18401011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 18401011 is about 4289.6399615819. The cubic root of 18401011 is about 264.0060595104.

Adding to 18401011 its reverse (11010481), we get a palindrome (29411492).

The spelling of 18401011 in words is "eighteen million, four hundred one thousand, eleven".