18701073 has 12 divisors (see below), whose sum is σ = 28434640. Its totient is φ = 11811096.

The previous prime is 18701041. The next prime is 18701083. The reversal of 18701073 is 37010781.

It is not a de Polignac number, because 18701073 - 2⁵ = 18701041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18701083) 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, 54511 + ... + 54852.

Almost surely, 2^18701073 is an apocalyptic number.

It is an amenable number.

18701073 is a deficient number, since it is larger than the sum of its proper divisors (9733567).

18701073 is a wasteful number, since it uses less digits than its factorization.

18701073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109388 (or 109385 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 18701073 is about 4324.4737252063. The cubic root of 18701073 is about 265.4333623604.

The spelling of 18701073 in words is "eighteen million, seven hundred one thousand, seventy-three".