18078461205 has 16 divisors (see below), whose sum is σ = 33057757824. Its totient is φ = 8264439360.

The previous prime is 18078461201. The next prime is 18078461207. The reversal of 18078461205 is 50216487081.

It is not a de Polignac number, because 18078461205 - 2² = 18078461201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078461201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86087806 + ... + 86088015.

It is an arithmetic number, because the mean of its divisors is an integer number (2066109864).

Almost surely, 2^18078461205 is an apocalyptic number.

18078461205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18078461205 is a deficient number, since it is larger than the sum of its proper divisors (14979296619).

18078461205 is a wasteful number, since it uses less digits than its factorization.

18078461205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172175836.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 18078461205 in words is "eighteen billion, seventy-eight million, four hundred sixty-one thousand, two hundred five".