2001720059 has 4 divisors (see below), whose sum is σ = 2039488416. Its totient is φ = 1963951704.

The previous prime is 2001720031. The next prime is 2001720101. The reversal of 2001720059 is 9500271002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001720059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001720859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18884099 + ... + 18884204.

It is an arithmetic number, because the mean of its divisors is an integer number (509872104).

Almost surely, 2^2001720059 is an apocalyptic number.

2001720059 is a deficient number, since it is larger than the sum of its proper divisors (37768357).

2001720059 is an equidigital number, since it uses as much as digits as its factorization.

2001720059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37768356.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2001720059 is about 44740.5862612461. The cubic root of 2001720059 is about 1260.2821361566.

The spelling of 2001720059 in words is "two billion, one million, seven hundred twenty thousand, fifty-nine".