20430434352 has 160 divisors (see below), whose sum is σ = 57236550912. Its totient is φ = 6256115712.

The previous prime is 20430434303. The next prime is 20430434359. The reversal of 20430434352 is 25343403402.

It is a super-2 number, since 2×20430434352² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20430434359) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6176283 + ... + 6179589.

Almost surely, 2^20430434352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430434352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28618275456).

20430434352 is an abundant number, since it is smaller than the sum of its proper divisors (36806116560).

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

20430434352 is a wasteful number, since it uses less digits than its factorization.

20430434352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 20430434352 its reverse (25343403402), we get a palindrome (45773837754).

The spelling of 20430434352 in words is "twenty billion, four hundred thirty million, four hundred thirty-four thousand, three hundred fifty-two".