18406537146 has 16 divisors (see below), whose sum is σ = 40903416000. Its totient is φ = 6135512364.

The previous prime is 18406537087. The next prime is 18406537157. The reversal of 18406537146 is 64173560481.

18406537146 is a `hidden beast` number, since 184 + 0 + 65 + 371 + 46 = 666.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 170430846 + ... + 170430953.

It is an arithmetic number, because the mean of its divisors is an integer number (2556463500).

Almost surely, 2^18406537146 is an apocalyptic number.

18406537146 is an abundant number, since it is smaller than the sum of its proper divisors (22496878854).

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

18406537146 is a wasteful number, since it uses less digits than its factorization.

18406537146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340861810 (or 340861804 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 18406537146 in words is "eighteen billion, four hundred six million, five hundred thirty-seven thousand, one hundred forty-six".