18939115210 has 8 divisors (see below), whose sum is σ = 34090407396. Its totient is φ = 7575646080.

The previous prime is 18939115093. The next prime is 18939115243. The reversal of 18939115210 is 1251193981.

18939115210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17368340521 + 1570774689 = 131789^2 + 39633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 946955751 + ... + 946955770.

Almost surely, 2^18939115210 is an apocalyptic number.

18939115210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18939115210 is a deficient number, since it is larger than the sum of its proper divisors (15151292186).

18939115210 is a wasteful number, since it uses less digits than its factorization.

18939115210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893911528.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 18939115210 in words is "eighteen billion, nine hundred thirty-nine million, one hundred fifteen thousand, two hundred ten".