18690608078 has 16 divisors (see below), whose sum is σ = 29818212480. Its totient is φ = 8756134656.

The previous prime is 18690608077. The next prime is 18690608087. The reversal of 18690608078 is 87080609681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18690608077) 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, 1224983 + ... + 1240146.

It is an arithmetic number, because the mean of its divisors is an integer number (1863638280).

Almost surely, 2^18690608078 is an apocalyptic number.

18690608078 is a deficient number, since it is larger than the sum of its proper divisors (11127604402).

18690608078 is a wasteful number, since it uses less digits than its factorization.

18690608078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465371.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 18690608078 in words is "eighteen billion, six hundred ninety million, six hundred eight thousand, seventy-eight".