18775274028 has 96 divisors (see below), whose sum is σ = 53095408128. Its totient is φ = 5040921600.

The previous prime is 18775274017. The next prime is 18775274041. The reversal of 18775274028 is 82047257781.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 31 ways as a sum of consecutive naturals, for example, 933963 + ... + 953853.

It is an arithmetic number, because the mean of its divisors is an integer number (553077168).

Almost surely, 2^18775274028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18775274028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26547704064).

18775274028 is an abundant number, since it is smaller than the sum of its proper divisors (34320134100).

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

18775274028 is a wasteful number, since it uses less digits than its factorization.

18775274028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20583 (or 20581 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 51.

The spelling of 18775274028 in words is "eighteen billion, seven hundred seventy-five million, two hundred seventy-four thousand, twenty-eight".