18740983 has 4 divisors (see below), whose sum is σ = 18772768. Its totient is φ = 18709200.

The previous prime is 18740941. The next prime is 18740993. The reversal of 18740983 is 38904781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38904781 = 4793 ⋅8117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18740983 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 (18740903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14991 + ... + 16192.

It is an arithmetic number, because the mean of its divisors is an integer number (4693192).

Almost surely, 2^18740983 is an apocalyptic number.

18740983 is a deficient number, since it is larger than the sum of its proper divisors (31785).

18740983 is an equidigital number, since it uses as much as digits as its factorization.

18740983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31784.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 18740983 is about 4329.0857002374. The cubic root of 18740983 is about 265.6220488346.

The spelling of 18740983 in words is "eighteen million, seven hundred forty thousand, nine hundred eighty-three".