18949530767 has 4 divisors (see below), whose sum is σ = 18954001080. Its totient is φ = 18945060456.

The previous prime is 18949530727. The next prime is 18949530779. The reversal of 18949530767 is 76703594981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18949530767 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 (18949530727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228792 + ... + 2237277.

It is an arithmetic number, because the mean of its divisors is an integer number (4738500270).

Almost surely, 2^18949530767 is an apocalyptic number.

18949530767 is a deficient number, since it is larger than the sum of its proper divisors (4470313).

18949530767 is an equidigital number, since it uses as much as digits as its factorization.

18949530767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470312.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 18949530767 in words is "eighteen billion, nine hundred forty-nine million, five hundred thirty thousand, seven hundred sixty-seven".