20021202109 has 8 divisors (see below), whose sum is σ = 20224797632. Its totient is φ = 19817784000.

The previous prime is 20021202083. The next prime is 20021202133. The reversal of 20021202109 is 90120212002.

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

It is a cyclic number.

It is not a de Polignac number, because 20021202109 - 2²³ = 20012813501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021202809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 188677 + ... + 275029.

It is an arithmetic number, because the mean of its divisors is an integer number (2528099704).

Almost surely, 2^20021202109 is an apocalyptic number.

It is an amenable number.

20021202109 is a deficient number, since it is larger than the sum of its proper divisors (203595523).

20021202109 is a wasteful number, since it uses less digits than its factorization.

20021202109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88707.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 20021202109 in words is "twenty billion, twenty-one million, two hundred two thousand, one hundred nine".