20257430444 has 12 divisors (see below), whose sum is σ = 35468706000. Its totient is φ = 10123514448.

The previous prime is 20257430443. The next prime is 20257430489. The reversal of 20257430444 is 44403475202.

It is not an unprimeable number, because it can be changed into a prime (20257430443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1291424 + ... + 1307015.

It is an arithmetic number, because the mean of its divisors is an integer number (2955725500).

Almost surely, 2^20257430444 is an apocalyptic number.

It is an amenable number.

20257430444 is a deficient number, since it is larger than the sum of its proper divisors (15211275556).

20257430444 is a wasteful number, since it uses less digits than its factorization.

20257430444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600392 (or 2600390 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 35.

The spelling of 20257430444 in words is "twenty billion, two hundred fifty-seven million, four hundred thirty thousand, four hundred forty-four".