20430343732 has 6 divisors (see below), whose sum is σ = 35753101538. Its totient is φ = 10215171864.

The previous prime is 20430343729. The next prime is 20430343733. The reversal of 20430343732 is 23734303402.

It can be written as a sum of positive squares in only one way, i.e., 20407265316 + 23078416 = 142854^2 + 4804^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20430343694 and 20430343703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430343733) 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 as a sum of consecutive naturals, namely, 2553792963 + ... + 2553792970.

Almost surely, 2^20430343732 is an apocalyptic number.

It is an amenable number.

20430343732 is a deficient number, since it is larger than the sum of its proper divisors (15322757806).

20430343732 is a wasteful number, since it uses less digits than its factorization.

20430343732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5107585937 (or 5107585935 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 31.

The spelling of 20430343732 in words is "twenty billion, four hundred thirty million, three hundred forty-three thousand, seven hundred thirty-two".