18083961 has 12 divisors (see below), whose sum is σ = 29852992. Its totient is φ = 10333656.

The previous prime is 18083959. The next prime is 18083987. The reversal of 18083961 is 16938081.

It is not a de Polignac number, because 18083961 - 2¹ = 18083959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18083921) 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 11 ways as a sum of consecutive naturals, for example, 143461 + ... + 143586.

Almost surely, 2^18083961 is an apocalyptic number.

It is an amenable number.

18083961 is a deficient number, since it is larger than the sum of its proper divisors (11769031).

18083961 is a wasteful number, since it uses less digits than its factorization.

18083961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287060 (or 287057 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 18083961 is about 4252.5240740059. The cubic root of 18083961 is about 262.4809890994.

It can be divided in two parts, 18083 and 961, that added together give a square (19044 = 138²).

The spelling of 18083961 in words is "eighteen million, eighty-three thousand, nine hundred sixty-one".