21113344232 has 8 divisors (see below), whose sum is σ = 39587520450. Its totient is φ = 10556672112.

The previous prime is 21113344181. The next prime is 21113344249. The reversal of 21113344232 is 23244331112.

It can be written as a sum of positive squares in only one way, i.e., 17526052996 + 3587291236 = 132386^2 + 59894^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319584007 + ... + 1319584022.

Almost surely, 2^21113344232 is an apocalyptic number.

It is an amenable number.

21113344232 is a deficient number, since it is larger than the sum of its proper divisors (18474176218).

21113344232 is a wasteful number, since it uses less digits than its factorization.

21113344232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639168035 (or 2639168031 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 21113344232 its reverse (23244331112), we get a palindrome (44357675344).

The spelling of 21113344232 in words is "twenty-one billion, one hundred thirteen million, three hundred forty-four thousand, two hundred thirty-two".