21344000234 has 4 divisors (see below), whose sum is σ = 32016000354. Its totient is φ = 10672000116.

The previous prime is 21344000233. The next prime is 21344000239. The reversal of 21344000234 is 43200044312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14863267225 + 6480733009 = 121915^2 + 80503^2 .

It is not an unprimeable number, because it can be changed into a prime (21344000231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5336000057 + ... + 5336000060.

Almost surely, 2^21344000234 is an apocalyptic number.

21344000234 is a deficient number, since it is larger than the sum of its proper divisors (10672000120).

21344000234 is a wasteful number, since it uses less digits than its factorization.

21344000234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10672000119.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21344000234 its reverse (43200044312), we get a palindrome (64544044546).

The spelling of 21344000234 in words is "twenty-one billion, three hundred forty-four million, two hundred thirty-four", and thus it is an aban number.