2100020002 has 8 divisors (see below), whose sum is σ = 3151104156. Its totient is φ = 1049651952.

The previous prime is 2100019993. The next prime is 2100020003. The reversal of 2100020002 is 2000200012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2047472001 + 52548001 = 45249^2 + 7249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2100020003) 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, 171633 + ... + 183460.

Almost surely, 2^2100020002 is an apocalyptic number.

2100020002 is a deficient number, since it is larger than the sum of its proper divisors (1051084154).

2100020002 is a wasteful number, since it uses less digits than its factorization.

2100020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358052.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 2100020002 is about 45825.9751887508. The cubic root of 2100020002 is about 1280.5832307118.

Adding to 2100020002 its reverse (2000200012), we get a palindrome (4100220014).

The spelling of 2100020002 in words is "two billion, one hundred million, twenty thousand, two".