18860705928 has 128 divisors (see below), whose sum is σ = 53656732800. Its totient is φ = 6136236288.

The previous prime is 18860705923. The next prime is 18860705957. The reversal of 18860705928 is 82950706881.

18860705928 is a `hidden beast` number, since 1 + 8 + 8 + 607 + 0 + 5 + 9 + 28 = 666.

It is a super-3 number, since 3×18860705928³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18860705923) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2251075 + ... + 2259437.

It is an arithmetic number, because the mean of its divisors is an integer number (419193225).

Almost surely, 2^18860705928 is an apocalyptic number.

18860705928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18860705928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26828366400).

18860705928 is an abundant number, since it is smaller than the sum of its proper divisors (34796026872).

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

18860705928 is a wasteful number, since it uses less digits than its factorization.

18860705928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8628 (or 8618 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 18860705928 in words is "eighteen billion, eight hundred sixty million, seven hundred five thousand, nine hundred twenty-eight".