20320133432 has 32 divisors (see below), whose sum is σ = 38848351680. Its totient is φ = 9960862080.

The previous prime is 20320133429. The next prime is 20320133443. The reversal of 20320133432 is 23433102302.

It is a junction number, because it is equal to n+sod(n) for n = 20320133398 and 20320133407.

It is a congruent number.

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, 568193 + ... + 602895.

It is an arithmetic number, because the mean of its divisors is an integer number (1214010990).

Almost surely, 2^20320133432 is an apocalyptic number.

It is an amenable number.

20320133432 is a deficient number, since it is larger than the sum of its proper divisors (18528218248).

20320133432 is a wasteful number, since it uses less digits than its factorization.

20320133432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36143 (or 36139 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 20320133432 its reverse (23433102302), we get a palindrome (43753235734).

The spelling of 20320133432 in words is "twenty billion, three hundred twenty million, one hundred thirty-three thousand, four hundred thirty-two".