20202323021 has 8 divisors (see below), whose sum is σ = 21274378080. Its totient is φ = 19131145488.

The previous prime is 20202322981. The next prime is 20202323027. The reversal of 20202323021 is 12032320202.

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 20202323021 - 2⁶ = 20202322957 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 (20202323027) 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, 171851 + ... + 264456.

It is an arithmetic number, because the mean of its divisors is an integer number (2659297260).

Almost surely, 2^20202323021 is an apocalyptic number.

It is an amenable number.

20202323021 is a deficient number, since it is larger than the sum of its proper divisors (1072055059).

20202323021 is a wasteful number, since it uses less digits than its factorization.

20202323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438763.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20202323021 its reverse (12032320202), we get a palindrome (32234643223).

The spelling of 20202323021 in words is "twenty billion, two hundred two million, three hundred twenty-three thousand, twenty-one".