18075969 has 6 divisors (see below), whose sum is σ = 26109746. Its totient is φ = 12050640.

The previous prime is 18075949. The next prime is 18075991. The reversal of 18075969 is 96957081.

It can be written as a sum of positive squares in only one way, i.e., 15303744 + 2772225 = 3912^2 + 1665^2 .

It is not a de Polignac number, because 18075969 - 2⁸ = 18075713 is a prime.

It is a super-2 number, since 2×18075969² = 653481310577922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18075919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1004212 + ... + 1004229.

Almost surely, 2^18075969 is an apocalyptic number.

It is an amenable number.

18075969 is a deficient number, since it is larger than the sum of its proper divisors (8033777).

18075969 is a wasteful number, since it uses less digits than its factorization.

18075969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008447 (or 2008444 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 18075969 is about 4251.5842929430. The cubic root of 18075969 is about 262.4423165769.

It can be divided in two parts, 18075 and 969, that added together give a square (19044 = 138²).

The spelling of 18075969 in words is "eighteen million, seventy-five thousand, nine hundred sixty-nine".