20421202323 has 8 divisors (see below), whose sum is σ = 27508973968. Its totient is φ = 13473782784.

The previous prime is 20421202313. The next prime is 20421202343. The reversal of 20421202323 is 32320212402.

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

It is not a de Polignac number, because 20421202323 - 2²¹ = 20419105171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20421202323.

It is not an unprimeable number, because it can be changed into a prime (20421202313) 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, 35087686 + ... + 35088267.

It is an arithmetic number, because the mean of its divisors is an integer number (3438621746).

Almost surely, 2^20421202323 is an apocalyptic number.

20421202323 is a deficient number, since it is larger than the sum of its proper divisors (7087771645).

20421202323 is an equidigital number, since it uses as much as digits as its factorization.

20421202323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70176053.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20421202323 its reverse (32320212402), we get a palindrome (52741414725).

The spelling of 20421202323 in words is "twenty billion, four hundred twenty-one million, two hundred two thousand, three hundred twenty-three".