20430343734 has 32 divisors (see below), whose sum is σ = 41425413120. Its totient is φ = 6716191872.

The previous prime is 20430343733. The next prime is 20430343771. The reversal of 20430343734 is 43734303402.

It is a junction number, because it is equal to n+sod(n) for n = 20430343695 and 20430343704.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396142 + ... + 444734.

It is an arithmetic number, because the mean of its divisors is an integer number (1294544160).

Almost surely, 2^20430343734 is an apocalyptic number.

20430343734 is an abundant number, since it is smaller than the sum of its proper divisors (20995069386).

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

20430343734 is a wasteful number, since it uses less digits than its factorization.

20430343734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49564.

The product of its (nonzero) digits is 72576, while the sum is 33.

The spelling of 20430343734 in words is "twenty billion, four hundred thirty million, three hundred forty-three thousand, seven hundred thirty-four".