2118864603920 has 80 divisors (see below), whose sum is σ = 5219984887680. Its totient is φ = 797620608000.

The previous prime is 2118864603917. The next prime is 2118864603937. The reversal of 2118864603920 is 293064688112.

It is a tau number, because it is divible by the number of its divisors (80).

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, 4386341 + ... + 4845380.

It is an arithmetic number, because the mean of its divisors is an integer number (65249811096).

Almost surely, 2^{2118864603920} is an apocalyptic number.

2118864603920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118864603920 is an abundant number, since it is smaller than the sum of its proper divisors (3101120283760).

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

2118864603920 is a wasteful number, since it uses less digits than its factorization.

2118864603920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231904 (or 9231898 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 2118864603920 in words is "two trillion, one hundred eighteen billion, eight hundred sixty-four million, six hundred three thousand, nine hundred twenty".