21831947234 has 8 divisors (see below), whose sum is σ = 32826079440. Its totient is φ = 10889920756.

The previous prime is 21831947219. The next prime is 21831947239. The reversal of 21831947234 is 43274913812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21831947239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13025384 + ... + 13027059.

It is an arithmetic number, because the mean of its divisors is an integer number (4103259930).

Almost surely, 2^21831947234 is an apocalyptic number.

21831947234 is a deficient number, since it is larger than the sum of its proper divisors (10994132206).

21831947234 is a wasteful number, since it uses less digits than its factorization.

21831947234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26052864.

The product of its digits is 290304, while the sum is 44.

The spelling of 21831947234 in words is "twenty-one billion, eight hundred thirty-one million, nine hundred forty-seven thousand, two hundred thirty-four".