20424121040 has 40 divisors (see below), whose sum is σ = 48136589448. Its totient is φ = 8057733120.

The previous prime is 20424121033. The next prime is 20424121043. The reversal of 20424121040 is 4012142402.

It can be written as a sum of positive squares in 4 ways, for example, as 306670144 + 20117450896 = 17512^2 + 141836^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424121043) 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 7 ways as a sum of consecutive naturals, for example, 1742801 + ... + 1754480.

Almost surely, 2^20424121040 is an apocalyptic number.

20424121040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20424121040 is an abundant number, since it is smaller than the sum of its proper divisors (27712468408).

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

20424121040 is a wasteful number, since it uses less digits than its factorization.

20424121040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497367 (or 3497361 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20424121040 its reverse (4012142402), we get a palindrome (24436263442).

The spelling of 20424121040 in words is "twenty billion, four hundred twenty-four million, one hundred twenty-one thousand, forty".