20424334440 has 64 divisors (see below), whose sum is σ = 62311550400. Its totient is φ = 5354173952.

The previous prime is 20424334439. The next prime is 20424334451. The reversal of 20424334440 is 4443342402.

It is a super-2 number, since 2×20424334440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20424334398 and 20424334407.

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, 1435317 + ... + 1449476.

It is an arithmetic number, because the mean of its divisors is an integer number (973617975).

Almost surely, 2^20424334440 is an apocalyptic number.

20424334440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424334440 is an abundant number, since it is smaller than the sum of its proper divisors (41887215960).

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

20424334440 is a wasteful number, since it uses less digits than its factorization.

20424334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884866 (or 2884862 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 30.

Adding to 20424334440 its reverse (4443342402), we get a palindrome (24867676842).

The spelling of 20424334440 in words is "twenty billion, four hundred twenty-four million, three hundred thirty-four thousand, four hundred forty".