18083949 has 16 divisors (see below), whose sum is σ = 26229504. Its totient is φ = 11016000.

The previous prime is 18083941. The next prime is 18083959. The reversal of 18083949 is 94938081.

It is not a de Polignac number, because 18083949 - 2³ = 18083941 is a prime.

It is a super-2 number, since 2×18083949² = 654058422869202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18083949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18083941) 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, 1644 + ... + 6234.

It is an arithmetic number, because the mean of its divisors is an integer number (1639344).

Almost surely, 2^18083949 is an apocalyptic number.

It is an amenable number.

18083949 is a deficient number, since it is larger than the sum of its proper divisors (8145555).

18083949 is a wasteful number, since it uses less digits than its factorization.

18083949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 18083949 is about 4252.5226630789. The cubic root of 18083949 is about 262.4809310411.

The spelling of 18083949 in words is "eighteen million, eighty-three thousand, nine hundred forty-nine".