20021001206 has 8 divisors (see below), whose sum is σ = 30393327384. Its totient is φ = 9889892080.

The previous prime is 20021001193. The next prime is 20021001229. The reversal of 20021001206 is 60210012002.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60304055 + ... + 60304386.

It is an arithmetic number, because the mean of its divisors is an integer number (3799165923).

Almost surely, 2^20021001206 is an apocalyptic number.

20021001206 is a deficient number, since it is larger than the sum of its proper divisors (10372326178).

20021001206 is a wasteful number, since it uses less digits than its factorization.

20021001206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120608526.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021001206 its reverse (60210012002), we get a palindrome (80231013208).

The spelling of 20021001206 in words is "twenty billion, twenty-one million, one thousand, two hundred six".