2173385920 has 168 divisors, whose sum is σ = 5572408464. Its totient is φ = 806750208.

The previous prime is 2173385887. The next prime is 2173385939. The reversal of 2173385920 is 295833712.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6263187 + ... + 6263533.

It is an arithmetic number, because the mean of its divisors is an integer number (33169098).

Almost surely, 2^2173385920 is an apocalyptic number.

2173385920 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 2173385920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2786204232).

2173385920 is an abundant number, since it is smaller than the sum of its proper divisors (3399022544).

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

2173385920 is a wasteful number, since it uses less digits than its factorization.

2173385920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 2173385920 is about 46619.5872997606. The cubic root of 2173385920 is about 1295.3256029950.

The spelling of 2173385920 in words is "two billion, one hundred seventy-three million, three hundred eighty-five thousand, nine hundred twenty".