18763953806 has 16 divisors (see below), whose sum is σ = 30314611824. Its totient is φ = 8659255104.

The previous prime is 18763953743. The next prime is 18763953841. The reversal of 18763953806 is 60835936781.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 207005 + ... + 283511.

It is an arithmetic number, because the mean of its divisors is an integer number (1894663239).

Almost surely, 2^18763953806 is an apocalyptic number.

18763953806 is a deficient number, since it is larger than the sum of its proper divisors (11550658018).

18763953806 is a wasteful number, since it uses less digits than its factorization.

18763953806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85955.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 18763953806 in words is "eighteen billion, seven hundred sixty-three million, nine hundred fifty-three thousand, eight hundred six".