20321432404 has 48 divisors (see below), whose sum is σ = 43789084416. Its totient is φ = 8035603200.

The previous prime is 20321432333. The next prime is 20321432429. The reversal of 20321432404 is 40423412302.

It is a happy number.

It is a super-2 number, since 2×20321432404² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877089 + ... + 899959.

It is an arithmetic number, because the mean of its divisors is an integer number (912272592).

Almost surely, 2^20321432404 is an apocalyptic number.

It is an amenable number.

20321432404 is an abundant number, since it is smaller than the sum of its proper divisors (23467652012).

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

20321432404 is a wasteful number, since it uses less digits than its factorization.

20321432404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25336 (or 25334 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20321432404 its reverse (40423412302), we get a palindrome (60744844706).

The spelling of 20321432404 in words is "twenty billion, three hundred twenty-one million, four hundred thirty-two thousand, four hundred four".