18934984777 has 8 divisors (see below), whose sum is σ = 19415139912. Its totient is φ = 18455702400.

The previous prime is 18934984763. The next prime is 18934984847. The reversal of 18934984777 is 77748943981.

It can be written as a sum of positive squares in 4 ways, for example, as 37258816 + 18897725961 = 6104^2 + 137469^2 .

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 18934984777 - 2²⁷ = 18800767049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18934985777) 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, 174138 + ... + 261139.

It is an arithmetic number, because the mean of its divisors is an integer number (2426892489).

Almost surely, 2^18934984777 is an apocalyptic number.

It is an amenable number.

18934984777 is a deficient number, since it is larger than the sum of its proper divisors (480155135).

18934984777 is a wasteful number, since it uses less digits than its factorization.

18934984777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436379.

The product of its digits is 85349376, while the sum is 67.

The spelling of 18934984777 in words is "eighteen billion, nine hundred thirty-four million, nine hundred eighty-four thousand, seven hundred seventy-seven".