18073551 has 8 divisors (see below), whose sum is σ = 24260400. Its totient is φ = 11967872.

The previous prime is 18073543. The next prime is 18073553. The reversal of 18073551 is 15537081.

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 18073551 - 2³ = 18073543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18073553) 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, 19770 + ... + 20663.

It is an arithmetic number, because the mean of its divisors is an integer number (3032550).

Almost surely, 2^18073551 is an apocalyptic number.

18073551 is a deficient number, since it is larger than the sum of its proper divisors (6186849).

18073551 is a wasteful number, since it uses less digits than its factorization.

18073551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40585.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 18073551 is about 4251.2999188484. The cubic root of 18073551 is about 262.4306138605.

The spelling of 18073551 in words is "eighteen million, seventy-three thousand, five hundred fifty-one".