18828236890 has 16 divisors (see below), whose sum is σ = 34717432680. Its totient is φ = 7347604480.

The previous prime is 18828236821. The next prime is 18828236891. The reversal of 18828236890 is 9863282881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16304480721 + 2523756169 = 127689^2 + 50237^2 .

It is not an unprimeable number, because it can be changed into a prime (18828236891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22960855 + ... + 22961674.

Almost surely, 2^18828236890 is an apocalyptic number.

18828236890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18828236890 is a deficient number, since it is larger than the sum of its proper divisors (15889195790).

18828236890 is a wasteful number, since it uses less digits than its factorization.

18828236890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45922577.

The product of its (nonzero) digits is 2654208, while the sum is 55.

The spelling of 18828236890 in words is "eighteen billion, eight hundred twenty-eight million, two hundred thirty-six thousand, eight hundred ninety".