2002021770 has 32 divisors (see below), whose sum is σ = 5491260288. Its totient is φ = 457604928.

The previous prime is 2002021753. The next prime is 2002021771. The reversal of 2002021770 is 771202002.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2002021771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4766509 + ... + 4766928.

It is an arithmetic number, because the mean of its divisors is an integer number (171601884).

Almost surely, 2^2002021770 is an apocalyptic number.

2002021770 is an abundant number, since it is smaller than the sum of its proper divisors (3489238518).

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

2002021770 is a wasteful number, since it uses less digits than its factorization.

2002021770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9533454.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 2002021770 is about 44743.9579161254. The cubic root of 2002021770 is about 1260.3454520166.

Adding to 2002021770 its reverse (771202002), we get a palindrome (2773223772).

The spelling of 2002021770 in words is "two billion, two million, twenty-one thousand, seven hundred seventy".