20423244430 has 32 divisors (see below), whose sum is σ = 37300616640. Its totient is φ = 8049699840.

The previous prime is 20423244407. The next prime is 20423244437. The reversal of 20423244430 is 3444232402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423244437) 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 in 15 ways as a sum of consecutive naturals, for example, 1433502 + ... + 1447678.

It is an arithmetic number, because the mean of its divisors is an integer number (1165644270).

Almost surely, 2^20423244430 is an apocalyptic number.

20423244430 is a deficient number, since it is larger than the sum of its proper divisors (16877372210).

20423244430 is a wasteful number, since it uses less digits than its factorization.

20423244430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284.

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 20423244430 its reverse (3444232402), we get a palindrome (23867476832).

The spelling of 20423244430 in words is "twenty billion, four hundred twenty-three million, two hundred forty-four thousand, four hundred thirty".