18123539078 has 16 divisors (see below), whose sum is σ = 29256323904. Its totient is φ = 8388908160.

The previous prime is 18123539069. The next prime is 18123539089. The reversal of 18123539078 is 87093532181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4367150 + ... + 4371297.

It is an arithmetic number, because the mean of its divisors is an integer number (1828520244).

Almost surely, 2^18123539078 is an apocalyptic number.

18123539078 is a deficient number, since it is larger than the sum of its proper divisors (11132784826).

18123539078 is a wasteful number, since it uses less digits than its factorization.

18123539078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8738527.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 18123539078 in words is "eighteen billion, one hundred twenty-three million, five hundred thirty-nine thousand, seventy-eight".