10020020002 has 4 divisors (see below), whose sum is σ = 15030030006. Its totient is φ = 5010010000.

The previous prime is 10020019969. The next prime is 10020020009. The reversal of 10020020002 is 20002002001.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 5073570441 + 4946449561 = 71229^2 + 70331^2 .

It is not an unprimeable number, because it can be changed into a prime (10020020009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2505004999 + ... + 2505005002.

Almost surely, 2^10020020002 is an apocalyptic number.

10020020002 is a deficient number, since it is larger than the sum of its proper divisors (5010010004).

10020020002 is an equidigital number, since it uses as much as digits as its factorization.

10020020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010010003.

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

Adding to 10020020002 its reverse (20002002001), we get a palindrome (30022022003).

The spelling of 10020020002 in words is "ten billion, twenty million, twenty thousand, two".