18981496 has 8 divisors (see below), whose sum is σ = 35590320. Its totient is φ = 9490744.

The previous prime is 18981493. The next prime is 18981511. The reversal of 18981496 is 69418981.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18981493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1186336 + ... + 1186351.

It is an arithmetic number, because the mean of its divisors is an integer number (4448790).

Almost surely, 2^18981496 is an apocalyptic number.

It is an amenable number.

18981496 is a deficient number, since it is larger than the sum of its proper divisors (16608824).

18981496 is a wasteful number, since it uses less digits than its factorization.

18981496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372693 (or 2372689 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 18981496 is about 4356.7758721330. The cubic root of 18981496 is about 266.7535119918.

The spelling of 18981496 in words is "eighteen million, nine hundred eighty-one thousand, four hundred ninety-six".