18051411 has 16 divisors (see below), whose sum is σ = 27753984. Its totient is φ = 10222464.

The previous prime is 18051403. The next prime is 18051413. The reversal of 18051411 is 11415081.

It is a happy number.

It is not a de Polignac number, because 18051411 - 2³ = 18051403 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (18051413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431 + ... + 6176.

It is an arithmetic number, because the mean of its divisors is an integer number (1734624).

Almost surely, 2^18051411 is an apocalyptic number.

18051411 is a deficient number, since it is larger than the sum of its proper divisors (9702573).

18051411 is a wasteful number, since it uses less digits than its factorization.

18051411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730.

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 18051411 is about 4248.6952114738. The cubic root of 18051411 is about 262.3234113909.

Adding to 18051411 its reverse (11415081), we get a palindrome (29466492).

The spelling of 18051411 in words is "eighteen million, fifty-one thousand, four hundred eleven".