18488481 has 16 divisors (see below), whose sum is σ = 28062720. Its totient is φ = 10717520.

The previous prime is 18488447. The next prime is 18488489.

18488481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18488481 - 2¹³ = 18480289 is a prime.

It is a super-2 number, since 2×18488481² = 683647859374722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18488489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11421 + ... + 12938.

It is an arithmetic number, because the mean of its divisors is an integer number (1753920).

Almost surely, 2^18488481 is an apocalyptic number.

18488481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18488481 is a deficient number, since it is larger than the sum of its proper divisors (9574239).

18488481 is a wasteful number, since it uses less digits than its factorization.

18488481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24396.

The product of its digits is 65536, while the sum is 42.

The square root of 18488481 is about 4299.8233684653. The cubic root of 18488481 is about 264.4237198187.

The spelling of 18488481 in words is "eighteen million, four hundred eighty-eight thousand, four hundred eighty-one".