20403332432 has 80 divisors (see below), whose sum is σ = 46549734912. Its totient is φ = 8482252800.

The previous prime is 20403332371. The next prime is 20403332501. The reversal of 20403332432 is 23423330402.

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, 577682 + ... + 611982.

Almost surely, 2^20403332432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20403332432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23274867456).

20403332432 is an abundant number, since it is smaller than the sum of its proper divisors (26146402480).

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

20403332432 is a wasteful number, since it uses less digits than its factorization.

20403332432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34476 (or 34470 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 26.

Adding to 20403332432 its reverse (23423330402), we get a palindrome (43826662834).

The spelling of 20403332432 in words is "twenty billion, four hundred three million, three hundred thirty-two thousand, four hundred thirty-two".