2001021740 has 12 divisors (see below), whose sum is σ = 4202145696. Its totient is φ = 800408688.

The previous prime is 2001021739. The next prime is 2001021749. The reversal of 2001021740 is 471201002.

It is not an unprimeable number, because it can be changed into a prime (2001021749) 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, 50025524 + ... + 50025563.

It is an arithmetic number, because the mean of its divisors is an integer number (350178808).

Almost surely, 2^2001021740 is an apocalyptic number.

2001021740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001021740 is an abundant number, since it is smaller than the sum of its proper divisors (2201123956).

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

2001021740 is a wasteful number, since it uses less digits than its factorization.

2001021740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100051096 (or 100051094 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2001021740 is about 44732.7814918768. The cubic root of 2001021740 is about 1260.1355653248.

Adding to 2001021740 its reverse (471201002), we get a palindrome (2472222742).

The spelling of 2001021740 in words is "two billion, one million, twenty-one thousand, seven hundred forty".