18074997 has 6 divisors (see below), whose sum is σ = 26108342. Its totient is φ = 12049992.

The previous prime is 18074989. The next prime is 18074999. The reversal of 18074997 is 79947081.

It can be written as a sum of positive squares in only one way, i.e., 16112196 + 1962801 = 4014^2 + 1401^2 .

It is not a de Polignac number, because 18074997 - 2³ = 18074989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18074999) 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, 1004158 + ... + 1004175.

Almost surely, 2^18074997 is an apocalyptic number.

It is an amenable number.

18074997 is a deficient number, since it is larger than the sum of its proper divisors (8033345).

18074997 is a wasteful number, since it uses less digits than its factorization.

18074997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008339 (or 2008336 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 18074997 is about 4251.4699810771. The cubic root of 18074997 is about 262.4376123846.

The spelling of 18074997 in words is "eighteen million, seventy-four thousand, nine hundred ninety-seven".