21234225234 has 32 divisors (see below), whose sum is σ = 42678411264. Its totient is φ = 7043153040.

The previous prime is 21234225203. The next prime is 21234225239. The reversal of 21234225234 is 43252243212.

It is not an unprimeable number, because it can be changed into a prime (21234225239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253199 + ... + 1270029.

It is an arithmetic number, because the mean of its divisors is an integer number (1333700352).

Almost surely, 2^21234225234 is an apocalyptic number.

21234225234 is an abundant number, since it is smaller than the sum of its proper divisors (21444186030).

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

21234225234 is a wasteful number, since it uses less digits than its factorization.

21234225234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17862.

The product of its digits is 23040, while the sum is 30.

Adding to 21234225234 its reverse (43252243212), we get a palindrome (64486468446).

The spelling of 21234225234 in words is "twenty-one billion, two hundred thirty-four million, two hundred twenty-five thousand, two hundred thirty-four".