20003432240 has 160 divisors (see below), whose sum is σ = 51532416000. Its totient is φ = 7160693760.

The previous prime is 20003432203. The next prime is 20003432249. The reversal of 20003432240 is 4223430002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (20003432249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18036806 + ... + 18037914.

It is an arithmetic number, because the mean of its divisors is an integer number (322077600).

Almost surely, 2^20003432240 is an apocalyptic number.

20003432240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20003432240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25766208000).

20003432240 is an abundant number, since it is smaller than the sum of its proper divisors (31528983760).

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

20003432240 is a wasteful number, since it uses less digits than its factorization.

20003432240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1429 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20003432240 its reverse (4223430002), we get a palindrome (24226862242).

The spelling of 20003432240 in words is "twenty billion, three million, four hundred thirty-two thousand, two hundred forty".