20310233430 has 64 divisors (see below), whose sum is σ = 50438868480. Its totient is φ = 5230638336.

The previous prime is 20310233413. The next prime is 20310233441. The reversal of 20310233430 is 3433201302.

It is a junction number, because it is equal to n+sod(n) for n = 20310233397 and 20310233406.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 26359 + ... + 203261.

It is an arithmetic number, because the mean of its divisors is an integer number (788107320).

Almost surely, 2^20310233430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20310233430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25219434240).

20310233430 is an abundant number, since it is smaller than the sum of its proper divisors (30128635050).

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

20310233430 is a wasteful number, since it uses less digits than its factorization.

20310233430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177045.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 20310233430 its reverse (3433201302), we get a palindrome (23743434732).

The spelling of 20310233430 in words is "twenty billion, three hundred ten million, two hundred thirty-three thousand, four hundred thirty".