20440040024 has 16 divisors (see below), whose sum is σ = 39216356520. Its totient is φ = 9982344960.

The previous prime is 20440040021. The next prime is 20440040081. The reversal of 20440040024 is 42004004402.

It is a junction number, because it is equal to n+sod(n) for n = 20440039978 and 20440040005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440040021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29709017 + ... + 29709704.

Almost surely, 2^20440040024 is an apocalyptic number.

It is an amenable number.

20440040024 is a deficient number, since it is larger than the sum of its proper divisors (18776316496).

20440040024 is a wasteful number, since it uses less digits than its factorization.

20440040024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59418770 (or 59418766 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 20440040024 its reverse (42004004402), we get a palindrome (62444044426).

It can be divided in two parts, 20 and 440040024, that added together give a palindrome (440040044).

The spelling of 20440040024 in words is "twenty billion, four hundred forty million, forty thousand, twenty-four".