18912778711 has 8 divisors (see below), whose sum is σ = 19012928000. Its totient is φ = 18812680920.

The previous prime is 18912778673. The next prime is 18912778723. The reversal of 18912778711 is 11787721981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18912778711 - 2¹⁹ = 18912254423 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 (18912778751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888766 + ... + 909796.

It is an arithmetic number, because the mean of its divisors is an integer number (2376616000).

Almost surely, 2^18912778711 is an apocalyptic number.

18912778711 is a deficient number, since it is larger than the sum of its proper divisors (100149289).

18912778711 is a wasteful number, since it uses less digits than its factorization.

18912778711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25749.

The product of its digits is 395136, while the sum is 52.

The spelling of 18912778711 in words is "eighteen billion, nine hundred twelve million, seven hundred seventy-eight thousand, seven hundred eleven".