18768016478 has 16 divisors (see below), whose sum is σ = 29143152000. Its totient is φ = 9054085152.

The previous prime is 18768016471. The next prime is 18768016489. The reversal of 18768016478 is 87461086781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18768016471) 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, 28973 + ... + 195896.

It is an arithmetic number, because the mean of its divisors is an integer number (1821447000).

Almost surely, 2^18768016478 is an apocalyptic number.

18768016478 is a deficient number, since it is larger than the sum of its proper divisors (10375135522).

18768016478 is a wasteful number, since it uses less digits than its factorization.

18768016478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226339.

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 18768016478 in words is "eighteen billion, seven hundred sixty-eight million, sixteen thousand, four hundred seventy-eight".