20202042321 has 24 divisors (see below), whose sum is σ = 30485880360. Its totient is φ = 12874848000.

The previous prime is 20202042317. The next prime is 20202042337. The reversal of 20202042321 is 12324020202.

20202042321 is a `hidden beast` number, since 20 + 202 + 0 + 423 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8121614400 + 12080427921 = 90120^2 + 109911^2 .

It is not a de Polignac number, because 20202042321 - 2² = 20202042317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202042294 and 20202042303.

It is not an unprimeable number, because it can be changed into a prime (20202047321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 356820 + ... + 409541.

It is an arithmetic number, because the mean of its divisors is an integer number (1270245015).

Almost surely, 2^20202042321 is an apocalyptic number.

It is an amenable number.

20202042321 is a deficient number, since it is larger than the sum of its proper divisors (10283838039).

20202042321 is a wasteful number, since it uses less digits than its factorization.

20202042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766497 (or 766494 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20202042321 its reverse (12324020202), we get a palindrome (32526062523).

The spelling of 20202042321 in words is "twenty billion, two hundred two million, forty-two thousand, three hundred twenty-one".