18040979041 has 4 divisors (see below), whose sum is σ = 18041851584. Its totient is φ = 18040106500.

The previous prime is 18040978979. The next prime is 18040979051. The reversal of 18040979041 is 14097904081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18040979041 - 2¹⁷ = 18040847969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18040979051) 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, 404485 + ... + 446866.

It is an arithmetic number, because the mean of its divisors is an integer number (4510462896).

Almost surely, 2^18040979041 is an apocalyptic number.

It is an amenable number.

18040979041 is a deficient number, since it is larger than the sum of its proper divisors (872543).

18040979041 is an equidigital number, since it uses as much as digits as its factorization.

18040979041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872542.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 18040979041 in words is "eighteen billion, forty million, nine hundred seventy-nine thousand, forty-one".