20443430757 has 16 divisors (see below), whose sum is σ = 27344984832. Its totient is φ = 13585451520.

The previous prime is 20443430747. The next prime is 20443430759. The reversal of 20443430757 is 75703434402.

It is a happy number.

It is not a de Polignac number, because 20443430757 - 2²⁸ = 20174995301 is a prime.

It is a super-2 number, since 2×20443430757² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443430759) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4138393 + ... + 4143329.

It is an arithmetic number, because the mean of its divisors is an integer number (1709061552).

Almost surely, 2^20443430757 is an apocalyptic number.

It is an amenable number.

20443430757 is a deficient number, since it is larger than the sum of its proper divisors (6901554075).

20443430757 is a wasteful number, since it uses less digits than its factorization.

20443430757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9068.

The product of its (nonzero) digits is 282240, while the sum is 39.

The spelling of 20443430757 in words is "twenty billion, four hundred forty-three million, four hundred thirty thousand, seven hundred fifty-seven".