18041968951 has 4 divisors (see below), whose sum is σ = 18042396192. Its totient is φ = 18041541712.

The previous prime is 18041968937. The next prime is 18041968961. The reversal of 18041968951 is 15986914081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18041968951 - 2³¹ = 15894485303 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 (18041968921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142351 + ... + 237376.

It is an arithmetic number, because the mean of its divisors is an integer number (4510599048).

Almost surely, 2^18041968951 is an apocalyptic number.

18041968951 is a deficient number, since it is larger than the sum of its proper divisors (427241).

18041968951 is an equidigital number, since it uses as much as digits as its factorization.

18041968951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427240.

The product of its (nonzero) digits is 622080, while the sum is 52.

The spelling of 18041968951 in words is "eighteen billion, forty-one million, nine hundred sixty-eight thousand, nine hundred fifty-one".