20431320304 has 10 divisors (see below), whose sum is σ = 39585683120. Its totient is φ = 10215660144.

The previous prime is 20431320263. The next prime is 20431320311. The reversal of 20431320304 is 40302313402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638478744 + ... + 638478775.

It is an arithmetic number, because the mean of its divisors is an integer number (3958568312).

Almost surely, 2^20431320304 is an apocalyptic number.

It is an amenable number.

20431320304 is a deficient number, since it is larger than the sum of its proper divisors (19154362816).

20431320304 is a wasteful number, since it uses less digits than its factorization.

20431320304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276957527 (or 1276957521 counting only the distinct ones).

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

Adding to 20431320304 its reverse (40302313402), we get a palindrome (60733633706).

The spelling of 20431320304 in words is "twenty billion, four hundred thirty-one million, three hundred twenty thousand, three hundred four".