18054993 has 8 divisors (see below), whose sum is σ = 26261856. Its totient is φ = 10942400.

The previous prime is 18054991. The next prime is 18055013. The reversal of 18054993 is 39945081.

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 18054993 - 2¹ = 18054991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18054991) 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, 273528 + ... + 273593.

It is an arithmetic number, because the mean of its divisors is an integer number (3282732).

Almost surely, 2^18054993 is an apocalyptic number.

It is an amenable number.

18054993 is a deficient number, since it is larger than the sum of its proper divisors (8206863).

18054993 is a wasteful number, since it uses less digits than its factorization.

18054993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547135.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 18054993 is about 4249.1167317456. The cubic root of 18054993 is about 262.3407614717.

The spelling of 18054993 in words is "eighteen million, fifty-four thousand, nine hundred ninety-three".