18118703838890 has 32 divisors (see below), whose sum is σ = 34920119258640. Its totient is φ = 6744516849664.

The previous prime is 18118703838889. The next prime is 18118703838931. The reversal of 18118703838890 is 9883830781181.

It can be written as a sum of positive squares in 8 ways, for example, as 2259456916201 + 15859246922689 = 1503149^2 + 3982367^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598752347 + ... + 598782606.

Almost surely, 2^{18118703838890} is an apocalyptic number.

18118703838890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18118703838890 is a deficient number, since it is larger than the sum of its proper divisors (16801415419750).

18118703838890 is a wasteful number, since it uses less digits than its factorization.

18118703838890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197535066.

The product of its (nonzero) digits is 18579456, while the sum is 65.

The spelling of 18118703838890 in words is "eighteen trillion, one hundred eighteen billion, seven hundred three million, eight hundred thirty-eight thousand, eight hundred ninety".