20431525343404 has 24 divisors (see below), whose sum is σ = 40863970155008. Its totient is φ = 8756170975440.

The previous prime is 20431525343377. The next prime is 20431525343417. The reversal of 20431525343404 is 40434352513402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6939492 + ... + 9435019.

Almost surely, 2^{20431525343404} is an apocalyptic number.

It is an amenable number.

20431525343404 is an abundant number, since it is smaller than the sum of its proper divisors (20432444811604).

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

20431525343404 is a wasteful number, since it uses less digits than its factorization.

20431525343404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16419085 (or 16419083 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 40.

Adding to 20431525343404 its reverse (40434352513402), we get a palindrome (60865877856806).

The spelling of 20431525343404 in words is "twenty trillion, four hundred thirty-one billion, five hundred twenty-five million, three hundred forty-three thousand, four hundred four".