20221021009 has 8 divisors (see below), whose sum is σ = 23286149568. Its totient is φ = 17199995280.

The previous prime is 20221021001. The next prime is 20221021027. The reversal of 20221021009 is 90012012202.

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 20221021009 - 2³ = 20221021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221021001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11024722 + ... + 11026555.

It is an arithmetic number, because the mean of its divisors is an integer number (2910768696).

Almost surely, 2^20221021009 is an apocalyptic number.

It is an amenable number.

20221021009 is a deficient number, since it is larger than the sum of its proper divisors (3065128559).

20221021009 is a wasteful number, since it uses less digits than its factorization.

20221021009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22051415.

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

The spelling of 20221021009 in words is "twenty billion, two hundred twenty-one million, twenty-one thousand, nine".