18507068478 has 48 divisors (see below), whose sum is σ = 40732819296. Its totient is φ = 6071811840.

The previous prime is 18507068453. The next prime is 18507068491. The reversal of 18507068478 is 87486070581.

It is a happy number.

18507068478 is a `hidden beast` number, since 1 + 8 + 507 + 0 + 68 + 4 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 625458 + ... + 654378.

It is an arithmetic number, because the mean of its divisors is an integer number (848600402).

Almost surely, 2^18507068478 is an apocalyptic number.

18507068478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18507068478 is an abundant number, since it is smaller than the sum of its proper divisors (22225750818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18507068478 is a wasteful number, since it uses less digits than its factorization.

18507068478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29489 (or 29486 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 18507068478 in words is "eighteen billion, five hundred seven million, sixty-eight thousand, four hundred seventy-eight".