20434124040 has 128 divisors (see below), whose sum is σ = 67971899520. Its totient is φ = 4872499200.

The previous prime is 20434124033. The next prime is 20434124057. The reversal of 20434124040 is 4042143402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20434124040.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46369 + ... + 207408.

It is an arithmetic number, because the mean of its divisors is an integer number (531030465).

Almost surely, 2^20434124040 is an apocalyptic number.

20434124040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20434124040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33985949760).

20434124040 is an abundant number, since it is smaller than the sum of its proper divisors (47537775480).

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

20434124040 is a wasteful number, since it uses less digits than its factorization.

20434124040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253863 (or 253859 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20434124040 its reverse (4042143402), we get a palindrome (24476267442).

The spelling of 20434124040 in words is "twenty billion, four hundred thirty-four million, one hundred twenty-four thousand, forty".