20021030002 has 4 divisors (see below), whose sum is σ = 30031545006. Its totient is φ = 10010515000.

The previous prime is 20021029979. The next prime is 20021030023. The reversal of 20021030002 is 20003012002.

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., 16086102561 + 3934927441 = 126831^2 + 62729^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005257499 + ... + 5005257502.

Almost surely, 2^20021030002 is an apocalyptic number.

20021030002 is a deficient number, since it is larger than the sum of its proper divisors (10010515004).

20021030002 is a wasteful number, since it uses less digits than its factorization.

20021030002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010515003.

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 20021030002 its reverse (20003012002), we get a palindrome (40024042004).

The spelling of 20021030002 in words is "twenty billion, twenty-one million, thirty thousand, two".