20331240432 has 40 divisors (see below), whose sum is σ = 53155181184. Its totient is φ = 6695427264.

The previous prime is 20331240343. The next prime is 20331240443. The reversal of 20331240432 is 23404213302.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 2547628 + ... + 2555595.

Almost surely, 2^20331240432 is an apocalyptic number.

It is an amenable number.

20331240432 is an abundant number, since it is smaller than the sum of its proper divisors (32823940752).

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

20331240432 is a wasteful number, since it uses less digits than its factorization.

20331240432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103317 (or 5103311 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20331240432 its reverse (23404213302), we get a palindrome (43735453734).

The spelling of 20331240432 in words is "twenty billion, three hundred thirty-one million, two hundred forty thousand, four hundred thirty-two".