18073791 has 12 divisors (see below), whose sum is σ = 27241968. Its totient is φ = 11525184.

The previous prime is 18073763. The next prime is 18073799. The reversal of 18073791 is 19737081.

It is not a de Polignac number, because 18073791 - 2¹⁰ = 18072767 is a prime.

It is a super-2 number, since 2×18073791² = 653323842223362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18073799) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43450 + ... + 43863.

It is an arithmetic number, because the mean of its divisors is an integer number (2270164).

Almost surely, 2^18073791 is an apocalyptic number.

18073791 is a deficient number, since it is larger than the sum of its proper divisors (9168177).

18073791 is a wasteful number, since it uses less digits than its factorization.

18073791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87342 (or 87339 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 18073791 is about 4251.3281454153. The cubic root of 18073791 is about 262.4317754671.

The spelling of 18073791 in words is "eighteen million, seventy-three thousand, seven hundred ninety-one".