20201021002 has 8 divisors (see below), whose sum is σ = 30312562500. Its totient is φ = 10096833504.

The previous prime is 20201020969. The next prime is 20201021021. The reversal of 20201021002 is 20012010202.

It can be written as a sum of positive squares in 2 ways, for example, as 18060940881 + 2140080121 = 134391^2 + 46261^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20201021002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831627 + ... + 1842622.

Almost surely, 2^20201021002 is an apocalyptic number.

20201021002 is a deficient number, since it is larger than the sum of its proper divisors (10111541498).

20201021002 is a wasteful number, since it uses less digits than its factorization.

20201021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3677000.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20201021002 its reverse (20012010202), we get a palindrome (40213031204).

The spelling of 20201021002 in words is "twenty billion, two hundred one million, twenty-one thousand, two".