20242440040 has 32 divisors (see below), whose sum is σ = 45607691880. Its totient is φ = 8085917952.

The previous prime is 20242440013. The next prime is 20242440041. The reversal of 20242440040 is 4004424202.

It can be written as a sum of positive squares in 4 ways, for example, as 15130476036 + 5111964004 = 123006^2 + 71498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20242439993 and 20242440020.

It is not an unprimeable number, because it can be changed into a prime (20242440041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315879 + ... + 374518.

Almost surely, 2^20242440040 is an apocalyptic number.

20242440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20242440040 is an abundant number, since it is smaller than the sum of its proper divisors (25365251840).

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

20242440040 is a wasteful number, since it uses less digits than its factorization.

20242440040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691141 (or 691137 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20242440040 its reverse (4004424202), we get a palindrome (24246864242).

The spelling of 20242440040 in words is "twenty billion, two hundred forty-two million, four hundred forty thousand, forty".