2117206473920 has 112 divisors (see below), whose sum is σ = 5320807280640. Its totient is φ = 800214137856.

The previous prime is 2117206473887. The next prime is 2117206473923. The reversal of 2117206473920 is 293746027112.

It is not an unprimeable number, because it can be changed into a prime (2117206473923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874039 + ... + 2783241.

Almost surely, 2^{2117206473920} is an apocalyptic number.

2117206473920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2117206473920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2660403640320).

2117206473920 is an abundant number, since it is smaller than the sum of its proper divisors (3203600806720).

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

2117206473920 is a wasteful number, since it uses less digits than its factorization.

2117206473920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909622 (or 909612 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 2117206473920 in words is "two trillion, one hundred seventeen billion, two hundred six million, four hundred seventy-three thousand, nine hundred twenty".