16118405 has 8 divisors (see below), whose sum is σ = 19466232. Its totient is φ = 12811968.

The previous prime is 16118381. The next prime is 16118407. The reversal of 16118405 is 50481161.

16118405 is nontrivially palindromic in base 12.

It can be written as a sum of positive squares in 4 ways, for example, as 1503076 + 14615329 = 1226^2 + 3823^2 .

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 16118405 - 2⁸ = 16118149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16118407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9482 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (2433279).

Almost surely, 2^16118405 is an apocalyptic number.

It is an amenable number.

16118405 is a deficient number, since it is larger than the sum of its proper divisors (3347827).

16118405 is a wasteful number, since it uses less digits than its factorization.

16118405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20695.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 16118405 is about 4014.7733435401. The cubic root of 16118405 is about 252.6042702381.

Adding to 16118405 its reverse (50481161), we get a palindrome (66599566).

The spelling of 16118405 in words is "sixteen million, one hundred eighteen thousand, four hundred five".