18496881 has 18 divisors (see below), whose sum is σ = 28933398. Its totient is φ = 11381760.

The previous prime is 18496879. The next prime is 18496883. The reversal of 18496881 is 18869481.

It is an interprime number because it is at equal distance from previous prime (18496879) and next prime (18496883).

It can be written as a sum of positive squares in 3 ways, for example, as 349281 + 18147600 = 591^2 + 4260^2 .

It is not a de Polignac number, because 18496881 - 2¹ = 18496879 is a prime.

It is a super-2 number, since 2×18496881² = 684269213456322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18496883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4560 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (1607411).

Almost surely, 2^18496881 is an apocalyptic number.

It is an amenable number.

18496881 is a deficient number, since it is larger than the sum of its proper divisors (10436517).

18496881 is a wasteful number, since it uses less digits than its factorization.

18496881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12193 (or 12177 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 18496881 is about 4300.8000418527. The cubic root of 18496881 is about 264.4637595772.

The spelling of 18496881 in words is "eighteen million, four hundred ninety-six thousand, eight hundred eighty-one".