21342231234 has 12 divisors (see below), whose sum is σ = 46241501046. Its totient is φ = 7114077072.

The previous prime is 21342231227. The next prime is 21342231259. The reversal of 21342231234 is 43213224312.

21342231234 is a `hidden beast` number, since 2 + 1 + 3 + 422 + 3 + 1 + 234 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20301975225 + 1040256009 = 142485^2 + 32253^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21342231198 and 21342231207.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 592839739 + ... + 592839774.

Almost surely, 2^21342231234 is an apocalyptic number.

21342231234 is an abundant number, since it is smaller than the sum of its proper divisors (24899269812).

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

21342231234 is a wasteful number, since it uses less digits than its factorization.

21342231234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185679521 (or 1185679518 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21342231234 its reverse (43213224312), we get a palindrome (64555455546).

The spelling of 21342231234 in words is "twenty-one billion, three hundred forty-two million, two hundred thirty-one thousand, two hundred thirty-four".