20430434310 has 128 divisors (see below), whose sum is σ = 57952226304. Its totient is φ = 4544309760.

The previous prime is 20430434303. The next prime is 20430434359. The reversal of 20430434310 is 1343403402.

It is a super-2 number, since 2×20430434310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 702172 + ... + 730688.

It is an arithmetic number, because the mean of its divisors is an integer number (452751768).

Almost surely, 2^20430434310 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20430434310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28976113152).

20430434310 is an abundant number, since it is smaller than the sum of its proper divisors (37521791994).

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

20430434310 is a wasteful number, since it uses less digits than its factorization.

20430434310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28718.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20430434310 its reverse (1343403402), we get a palindrome (21773837712).

The spelling of 20430434310 in words is "twenty billion, four hundred thirty million, four hundred thirty-four thousand, three hundred ten".