20434034440 has 64 divisors (see below), whose sum is σ = 48632918400. Its totient is φ = 7711114752.

The previous prime is 20434034393. The next prime is 20434034449. The reversal of 20434034440 is 4443043402.

It is a super-2 number, since 2×20434034440² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20434034399 and 20434034408.

It is not an unprimeable number, because it can be changed into a prime (20434034449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84970 + ... + 219289.

It is an arithmetic number, because the mean of its divisors is an integer number (759889350).

Almost surely, 2^20434034440 is an apocalyptic number.

20434034440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20434034440 is an abundant number, since it is smaller than the sum of its proper divisors (28198883960).

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

20434034440 is a wasteful number, since it uses less digits than its factorization.

20434034440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304366 (or 304362 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20434034440 its reverse (4443043402), we get a palindrome (24877077842).

The spelling of 20434034440 in words is "twenty billion, four hundred thirty-four million, thirty-four thousand, four hundred forty".