20040312432 has 120 divisors (see below), whose sum is σ = 61210887312. Its totient is φ = 5631897600.

The previous prime is 20040312407. The next prime is 20040312433. The reversal of 20040312432 is 23421304002.

It is a super-2 number, since 2×20040312432² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20040312399 and 20040312408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040312433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73632 + ... + 213312.

Almost surely, 2^20040312432 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 20040312432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30605443656).

20040312432 is an abundant number, since it is smaller than the sum of its proper divisors (41170574880).

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

20040312432 is a wasteful number, since it uses less digits than its factorization.

20040312432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139767 (or 139754 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20040312432 its reverse (23421304002), we get a palindrome (43461616434).

The spelling of 20040312432 in words is "twenty billion, forty million, three hundred twelve thousand, four hundred thirty-two".