18869896880 has 40 divisors (see below), whose sum is σ = 44275030800. Its totient is φ = 7478707968.

The previous prime is 18869896823. The next prime is 18869896891. The reversal of 18869896880 is 8869896881.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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, 1073270 + ... + 1090709.

It is an arithmetic number, because the mean of its divisors is an integer number (1106875770).

Almost surely, 2^18869896880 is an apocalyptic number.

18869896880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18869896880 is an abundant number, since it is smaller than the sum of its proper divisors (25405133920).

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

18869896880 is a wasteful number, since it uses less digits than its factorization.

18869896880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164101 (or 2164095 counting only the distinct ones).

The product of its (nonzero) digits is 95551488, while the sum is 71.

Subtracting from 18869896880 its reverse (8869896881), we obtain a palindrome (9999999999).

The spelling of 18869896880 in words is "eighteen billion, eight hundred sixty-nine million, eight hundred ninety-six thousand, eight hundred eighty".