20431342404 has 72 divisors (see below), whose sum is σ = 56357290080. Its totient is φ = 6189523200.

The previous prime is 20431342369. The next prime is 20431342429. The reversal of 20431342404 is 40424313402.

It is a happy number.

20431342404 is a `hidden beast` number, since 204 + 3 + 13 + 42 + 404 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2141164 + ... + 2150684.

It is an arithmetic number, because the mean of its divisors is an integer number (782740140).

Almost surely, 2^20431342404 is an apocalyptic number.

It is an amenable number.

20431342404 is an abundant number, since it is smaller than the sum of its proper divisors (35925947676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431342404 is a wasteful number, since it uses less digits than its factorization.

20431342404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14961 (or 14956 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 20431342404 its reverse (40424313402), we get a palindrome (60855655806).

The spelling of 20431342404 in words is "twenty billion, four hundred thirty-one million, three hundred forty-two thousand, four hundred four".