18532481 has 12 divisors (see below), whose sum is σ = 20582016. Its totient is φ = 16672920.

The previous prime is 18532463. The next prime is 18532517. The reversal of 18532481 is 18423581.

It is not a de Polignac number, because 18532481 - 2¹⁴ = 18516097 is a prime.

It is a super-2 number, since 2×18532481² = 686905704030722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18532081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11720 + ... + 13206.

It is an arithmetic number, because the mean of its divisors is an integer number (1715168).

Almost surely, 2^18532481 is an apocalyptic number.

18532481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18532481 is a deficient number, since it is larger than the sum of its proper divisors (2049535).

18532481 is a wasteful number, since it uses less digits than its factorization.

18532481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1601 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 18532481 is about 4304.9368171902. The cubic root of 18532481 is about 264.6333174639.

Subtracting from 18532481 its reverse (18423581), we obtain a square (108900 = 330²).

It can be divided in two parts, 1853 and 2481, that added together give a palindrome (4334).

The spelling of 18532481 in words is "eighteen million, five hundred thirty-two thousand, four hundred eighty-one".