18803539880 has 32 divisors (see below), whose sum is σ = 42368381640. Its totient is φ = 7510675200.

The previous prime is 18803539879. The next prime is 18803539889. The reversal of 18803539880 is 8893530881.

It can be written as a sum of positive squares in 4 ways, for example, as 16217003716 + 2586536164 = 127346^2 + 50858^2 .

It is a super-2 number, since 2×18803539880² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18803539889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307259 + ... + 363338.

Almost surely, 2^18803539880 is an apocalyptic number.

18803539880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18803539880 is an abundant number, since it is smaller than the sum of its proper divisors (23564841760).

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

18803539880 is a wasteful number, since it uses less digits than its factorization.

18803539880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671309 (or 671305 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 18803539880 in words is "eighteen billion, eight hundred three million, five hundred thirty-nine thousand, eight hundred eighty".