18542984 has 8 divisors (see below), whose sum is σ = 34768110. Its totient is φ = 9271488.

The previous prime is 18542983. The next prime is 18542989. The reversal of 18542984 is 48924581.

It can be written as a sum of positive squares in only one way, i.e., 12888100 + 5654884 = 3590^2 + 2378^2 .

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

It is a super-3 number, since 3×18542984³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18542981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1158929 + ... + 1158944.

Almost surely, 2^18542984 is an apocalyptic number.

It is an amenable number.

18542984 is a deficient number, since it is larger than the sum of its proper divisors (16225126).

18542984 is a wasteful number, since it uses less digits than its factorization.

18542984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317879 (or 2317875 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 18542984 is about 4306.1565229332. The cubic root of 18542984 is about 264.6833003171.

The spelling of 18542984 in words is "eighteen million, five hundred forty-two thousand, nine hundred eighty-four".