20002057940 has 24 divisors (see below), whose sum is σ = 42007504392. Its totient is φ = 8000216960.

The previous prime is 20002057927. The next prime is 20002057949. The reversal of 20002057940 is 4975020002.

It can be written as a sum of positive squares in 4 ways, for example, as 12569548996 + 7432508944 = 112114^2 + 86212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002057949) 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, 311042 + ... + 369798.

It is an arithmetic number, because the mean of its divisors is an integer number (1750312683).

Almost surely, 2^20002057940 is an apocalyptic number.

20002057940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002057940 is an abundant number, since it is smaller than the sum of its proper divisors (22005446452).

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

20002057940 is a wasteful number, since it uses less digits than its factorization.

20002057940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75787 (or 75785 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 20002057940 its reverse (4975020002), we get a palindrome (24977077942).

The spelling of 20002057940 in words is "twenty billion, two million, fifty-seven thousand, nine hundred forty".