18785279476 has 6 divisors (see below), whose sum is σ = 32874239090. Its totient is φ = 9392639736.

The previous prime is 18785279437. The next prime is 18785279479. The reversal of 18785279476 is 67497258781.

It can be written as a sum of positive squares in only one way, i.e., 18259035876 + 526243600 = 135126^2 + 22940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18785279479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2348159931 + ... + 2348159938.

Almost surely, 2^18785279476 is an apocalyptic number.

It is an amenable number.

18785279476 is a deficient number, since it is larger than the sum of its proper divisors (14088959614).

18785279476 is a wasteful number, since it uses less digits than its factorization.

18785279476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696319873 (or 4696319871 counting only the distinct ones).

The product of its digits is 47416320, while the sum is 64.

The spelling of 18785279476 in words is "eighteen billion, seven hundred eighty-five million, two hundred seventy-nine thousand, four hundred seventy-six".