2001694720 has 104 divisors (see below), whose sum is σ = 4917352176. Its totient is φ = 781713408.

The previous prime is 2001694697. The next prime is 2001694727. The reversal of 2001694720 is 274961002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001694727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879504 + ... + 881776.

Almost surely, 2^2001694720 is an apocalyptic number.

2001694720 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 2001694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2458676088).

2001694720 is an abundant number, since it is smaller than the sum of its proper divisors (2915657456).

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

2001694720 is an equidigital number, since it uses as much as digits as its factorization.

2001694720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2323 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2001694720 is about 44740.3030834616. The cubic root of 2001694720 is about 1260.2768183261.

The spelling of 2001694720 in words is "two billion, one million, six hundred ninety-four thousand, seven hundred twenty".