21043112038 has 8 divisors (see below), whose sum is σ = 33992719488. Its totient is φ = 9712205544.

The previous prime is 21043112011. The next prime is 21043112039. The reversal of 21043112038 is 83021134012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043112039) 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, 404675206 + ... + 404675257.

It is an arithmetic number, because the mean of its divisors is an integer number (4249089936).

Almost surely, 2^21043112038 is an apocalyptic number.

21043112038 is a deficient number, since it is larger than the sum of its proper divisors (12949607450).

21043112038 is a wasteful number, since it uses less digits than its factorization.

21043112038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809350478.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 21043112038 in words is "twenty-one billion, forty-three million, one hundred twelve thousand, thirty-eight".