20431212324 has 12 divisors (see below), whose sum is σ = 47672828784. Its totient is φ = 6810404104.

The previous prime is 20431212301. The next prime is 20431212349. The reversal of 20431212324 is 42321213402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 20431212294 and 20431212303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851300502 + ... + 851300525.

It is an arithmetic number, because the mean of its divisors is an integer number (3972735732).

Almost surely, 2^20431212324 is an apocalyptic number.

It is an amenable number.

20431212324 is an abundant number, since it is smaller than the sum of its proper divisors (27241616460).

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

20431212324 is a wasteful number, since it uses less digits than its factorization.

20431212324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702601034 (or 1702601032 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20431212324 its reverse (42321213402), we get a palindrome (62752425726).

The spelling of 20431212324 in words is "twenty billion, four hundred thirty-one million, two hundred twelve thousand, three hundred twenty-four".