18157284620 has 12 divisors (see below), whose sum is σ = 38130297744. Its totient is φ = 7262913840.

The previous prime is 18157284617. The next prime is 18157284647. The reversal of 18157284620 is 2648275181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453932096 + ... + 453932135.

It is an arithmetic number, because the mean of its divisors is an integer number (3177524812).

Almost surely, 2^18157284620 is an apocalyptic number.

18157284620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18157284620 is an abundant number, since it is smaller than the sum of its proper divisors (19973013124).

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

18157284620 is a wasteful number, since it uses less digits than its factorization.

18157284620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907864240 (or 907864238 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 18157284620 in words is "eighteen billion, one hundred fifty-seven million, two hundred eighty-four thousand, six hundred twenty".