18978064703 has 8 divisors (see below), whose sum is σ = 20440366800. Its totient is φ = 17516112768.

The previous prime is 18978064691. The next prime is 18978064739. The reversal of 18978064703 is 30746087981.

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 18978064703 - 2⁶ = 18978064639 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 (18978064793) 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 7 ways as a sum of consecutive naturals, for example, 30983 + ... + 197271.

It is an arithmetic number, because the mean of its divisors is an integer number (2555045850).

Almost surely, 2^18978064703 is an apocalyptic number.

18978064703 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18978064703 is a deficient number, since it is larger than the sum of its proper divisors (1462302097).

18978064703 is a wasteful number, since it uses less digits than its factorization.

18978064703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175081.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 18978064703 in words is "eighteen billion, nine hundred seventy-eight million, sixty-four thousand, seven hundred three".