2118916922500 has 135 divisors (see below), whose sum is σ = 5391457742979. Its totient is φ = 726311124000.

The previous prime is 2118916922489. The next prime is 2118916922527. The reversal of 2118916922500 is 52296198112.

It is a happy number.

The square root of 2118916922500 is 1455650.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 166123086724 + 1952793835776 = 407582^2 + 1397424^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 509475421 + ... + 509479579.

Almost surely, 2^{2118916922500} is an apocalyptic number.

2118916922500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2118916922500 is the 1455650-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118916922500

2118916922500 is an abundant number, since it is smaller than the sum of its proper divisors (3272540820479).

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

2118916922500 is an frugal number, since it uses more digits than its factorization.

2118916922500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356 (or 4173 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 2118916922500 in words is "two trillion, one hundred eighteen billion, nine hundred sixteen million, nine hundred twenty-two thousand, five hundred".