18475965 has 16 divisors (see below), whose sum is σ = 32846400. Its totient is φ = 9853776.

The previous prime is 18475931. The next prime is 18475973. The reversal of 18475965 is 56957481.

18475965 is a `hidden beast` number, since 18 + 47 + 596 + 5 = 666.

It is not a de Polignac number, because 18475965 - 2⁷ = 18475837 is a prime.

It is a super-3 number, since 3×18475965³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18475965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68295 + ... + 68564.

It is an arithmetic number, because the mean of its divisors is an integer number (2052900).

Almost surely, 2^18475965 is an apocalyptic number.

18475965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18475965 is a deficient number, since it is larger than the sum of its proper divisors (14370435).

18475965 is a wasteful number, since it uses less digits than its factorization.

18475965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136873 (or 136867 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 18475965 is about 4298.3677134466. The cubic root of 18475965 is about 264.3640380747.

The spelling of 18475965 in words is "eighteen million, four hundred seventy-five thousand, nine hundred sixty-five".