2001720370 has 16 divisors (see below), whose sum is σ = 3880258200. Its totient is φ = 739096704.

The previous prime is 2001720367. The next prime is 2001720443. The reversal of 2001720370 is 730271002.

It can be written as a sum of positive squares in 4 ways, for example, as 1146567321 + 855153049 = 33861^2 + 29243^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7698795 + ... + 7699054.

Almost surely, 2^2001720370 is an apocalyptic number.

2001720370 is a deficient number, since it is larger than the sum of its proper divisors (1878537830).

2001720370 is a wasteful number, since it uses less digits than its factorization.

2001720370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15397869.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 2001720370 is about 44740.5897368374. The cubic root of 2001720370 is about 1260.2822014251.

Adding to 2001720370 its reverse (730271002), we get a palindrome (2731991372).

The spelling of 2001720370 in words is "two billion, one million, seven hundred twenty thousand, three hundred seventy".