20331320404 has 12 divisors (see below), whose sum is σ = 35584009524. Its totient is φ = 10164460544.

The previous prime is 20331320393. The next prime is 20331320417. The reversal of 20331320404 is 40402313302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6972584004 + 13358736400 = 83502^2 + 115580^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261229 + ... + 330004.

It is an arithmetic number, because the mean of its divisors is an integer number (2965334127).

Almost surely, 2^20331320404 is an apocalyptic number.

It is an amenable number.

20331320404 is a deficient number, since it is larger than the sum of its proper divisors (15252689120).

20331320404 is a wasteful number, since it uses less digits than its factorization.

20331320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599834 (or 599832 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20331320404 its reverse (40402313302), we get a palindrome (60733633706).

The spelling of 20331320404 in words is "twenty billion, three hundred thirty-one million, three hundred twenty thousand, four hundred four".