18373481 has 32 divisors (see below), whose sum is σ = 23846400. Its totient is φ = 14074368.

The previous prime is 18373463. The next prime is 18373499. The reversal of 18373481 is 18437381.

It is an interprime number because it is at equal distance from previous prime (18373463) and next prime (18373499).

It is not a de Polignac number, because 18373481 - 2⁶ = 18373417 is a prime.

It is a super-2 number, since 2×18373481² = 675169608114722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18373441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134045 + ... + 134181.

It is an arithmetic number, because the mean of its divisors is an integer number (745200).

Almost surely, 2^18373481 is an apocalyptic number.

It is an amenable number.

18373481 is a deficient number, since it is larger than the sum of its proper divisors (5472919).

18373481 is a wasteful number, since it uses less digits than its factorization.

18373481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 184 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 18373481 is about 4286.4298664506. The cubic root of 18373481 is about 263.8743327906.

The spelling of 18373481 in words is "eighteen million, three hundred seventy-three thousand, four hundred eighty-one".