18053507 has 8 divisors (see below), whose sum is σ = 19560816. Its totient is φ = 16595712.

The previous prime is 18053461. The next prime is 18053509. The reversal of 18053507 is 70535081.

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 18053507 - 2⁸ = 18053251 is a prime.

It is a super-2 number, since 2×18053507² = 651858229998098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18053507.

It is not an unprimeable number, because it can be changed into a prime (18053509) 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, 11618 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (2445102).

Almost surely, 2^18053507 is an apocalyptic number.

18053507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18053507 is a deficient number, since it is larger than the sum of its proper divisors (1507309).

18053507 is a wasteful number, since it uses less digits than its factorization.

18053507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24757.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 18053507 is about 4248.9418682773. The cubic root of 18053507 is about 262.3335640339. Note that the first 3 decimals are identical.

Adding to 18053507 its reverse (70535081), we get a palindrome (88588588).

It can be divided in two parts, 1 and 8053507, that added together give a palindrome (8053508).

The spelling of 18053507 in words is "eighteen million, fifty-three thousand, five hundred seven".