20423026234 has 16 divisors (see below), whose sum is σ = 33882693768. Its totient is φ = 9171254592.

The previous prime is 20423026199. The next prime is 20423026237. The reversal of 20423026234 is 43262032402.

It can be written as a sum of positive squares in 4 ways, for example, as 15867181225 + 4555845009 = 125965^2 + 67497^2 .

It is not an unprimeable number, because it can be changed into a prime (20423026237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10613917 + ... + 10615840.

Almost surely, 2^20423026234 is an apocalyptic number.

20423026234 is a deficient number, since it is larger than the sum of its proper divisors (13459667534).

20423026234 is a wasteful number, since it uses less digits than its factorization.

20423026234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21229809.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 20423026234 its reverse (43262032402), we get a palindrome (63685058636).

The spelling of 20423026234 in words is "twenty billion, four hundred twenty-three million, twenty-six thousand, two hundred thirty-four".