20440431020 has 48 divisors (see below), whose sum is σ = 43594806528. Its totient is φ = 8048736960.

The previous prime is 20440430987. The next prime is 20440431041. The reversal of 20440431020 is 2013404402.

It is a super-2 number, since 2×20440431020² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20440430983 and 20440431001.

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, 2422529 + ... + 2430951.

It is an arithmetic number, because the mean of its divisors is an integer number (908225136).

Almost surely, 2^20440431020 is an apocalyptic number.

20440431020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20440431020 is an abundant number, since it is smaller than the sum of its proper divisors (23154375508).

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

20440431020 is a wasteful number, since it uses less digits than its factorization.

20440431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310 (or 10308 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20440431020 its reverse (2013404402), we get a palindrome (22453835422).

The spelling of 20440431020 in words is "twenty billion, four hundred forty million, four hundred thirty-one thousand, twenty".