20400023321 has 8 divisors (see below), whose sum is σ = 20885741184. Its totient is φ = 19914819120.

The previous prime is 20400023309. The next prime is 20400023333. The reversal of 20400023321 is 12332000402.

It is an interprime number because it is at equal distance from previous prime (20400023309) and next prime (20400023333).

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 20400023321 - 2⁶ = 20400023257 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 20400023321.

It is not an unprimeable number, because it can be changed into a prime (20400023221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47441 + ... + 207486.

It is an arithmetic number, because the mean of its divisors is an integer number (2610717648).

Almost surely, 2^20400023321 is an apocalyptic number.

It is an amenable number.

20400023321 is a deficient number, since it is larger than the sum of its proper divisors (485717863).

20400023321 is a wasteful number, since it uses less digits than its factorization.

20400023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256831.

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

Adding to 20400023321 its reverse (12332000402), we get a palindrome (32732023723).

The spelling of 20400023321 in words is "twenty billion, four hundred million, twenty-three thousand, three hundred twenty-one".