18905041028 has 12 divisors (see below), whose sum is σ = 33178620300. Its totient is φ = 9425435232.

The previous prime is 18905041009. The next prime is 18905041033. The reversal of 18905041028 is 82014050981.

It can be written as a sum of positive squares in 2 ways, for example, as 6579156544 + 12325884484 = 81112^2 + 111022^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18905040982 and 18905041000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6769751 + ... + 6772542.

It is an arithmetic number, because the mean of its divisors is an integer number (2764885025).

Almost surely, 2^18905041028 is an apocalyptic number.

It is an amenable number.

18905041028 is a deficient number, since it is larger than the sum of its proper divisors (14273579272).

18905041028 is a wasteful number, since it uses less digits than its factorization.

18905041028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13542646 (or 13542644 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 18905041028 in words is "eighteen billion, nine hundred five million, forty-one thousand, twenty-eight".