2193694720 has 168 divisors, whose sum is σ = 6129666684. Its totient is φ = 751435776.

The previous prime is 2193694703. The next prime is 2193694747. The reversal of 2193694720 is 274963912.

It can be written as a sum of positive squares in 2 ways, for example, as 2047381504 + 146313216 = 45248^2 + 12096^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2006494 + ... + 2007586.

Almost surely, 2^2193694720 is an apocalyptic number.

2193694720 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 2193694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3064833342).

2193694720 is an abundant number, since it is smaller than the sum of its proper divisors (3935971964).

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

2193694720 is an equidigital number, since it uses as much as digits as its factorization.

2193694720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 2193694720 is about 46836.8948586475. The cubic root of 2193694720 is about 1299.3477438005.

The spelling of 2193694720 in words is "two billion, one hundred ninety-three million, six hundred ninety-four thousand, seven hundred twenty".