18856481 has 16 divisors (see below), whose sum is σ = 22650624. Its totient is φ = 15347904.

The previous prime is 18856477. The next prime is 18856483. The reversal of 18856481 is 18465881.

It is a cyclic number.

It is not a de Polignac number, because 18856481 - 2² = 18856477 is a prime.

It is a super-2 number, since 2×18856481² = 711133751406722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18856483) 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 15 ways as a sum of consecutive naturals, for example, 27515 + ... + 28191.

It is an arithmetic number, because the mean of its divisors is an integer number (1415664).

Almost surely, 2^18856481 is an apocalyptic number.

It is an amenable number.

18856481 is a deficient number, since it is larger than the sum of its proper divisors (3794143).

18856481 is a wasteful number, since it uses less digits than its factorization.

18856481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

The product of its digits is 61440, while the sum is 41.

The square root of 18856481 is about 4342.4049788107. The cubic root of 18856481 is about 266.1665952838.

The spelling of 18856481 in words is "eighteen million, eight hundred fifty-six thousand, four hundred eighty-one".