18038463 has 8 divisors (see below), whose sum is σ = 25097088. Its totient is φ = 11502744.

The previous prime is 18038453. The next prime is 18038533. The reversal of 18038463 is 36483081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18038463 - 2⁹ = 18037951 is a prime.

It is a super-2 number, since 2×18038463² = 650772294804738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038413) 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, 130645 + ... + 130782.

It is an arithmetic number, because the mean of its divisors is an integer number (3137136).

Almost surely, 2^18038463 is an apocalyptic number.

18038463 is a deficient number, since it is larger than the sum of its proper divisors (7058625).

18038463 is a wasteful number, since it uses less digits than its factorization.

18038463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261453.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 18038463 is about 4247.1711762066. The cubic root of 18038463 is about 262.2606762035.

The spelling of 18038463 in words is "eighteen million, thirty-eight thousand, four hundred sixty-three".