20430344775 has 12 divisors (see below), whose sum is σ = 33778170152. Its totient is φ = 10896183840.

The previous prime is 20430344713. The next prime is 20430344777. The reversal of 20430344775 is 57744303402.

It is a happy number.

It is not a de Polignac number, because 20430344775 - 2²⁶ = 20363235911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430344777) 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 11 ways as a sum of consecutive naturals, for example, 136202224 + ... + 136202373.

Almost surely, 2^20430344775 is an apocalyptic number.

20430344775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20430344775 is a deficient number, since it is larger than the sum of its proper divisors (13347825377).

20430344775 is a wasteful number, since it uses less digits than its factorization.

20430344775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272404610 (or 272404605 counting only the distinct ones).

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

The spelling of 20430344775 in words is "twenty billion, four hundred thirty million, three hundred forty-four thousand, seven hundred seventy-five".