21112330747 has 8 divisors (see below), whose sum is σ = 21383445440. Its totient is φ = 20841312960.

The previous prime is 21112330727. The next prime is 21112330751. The reversal of 21112330747 is 74703321112.

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

It is a cyclic number.

It is not a de Polignac number, because 21112330747 - 2¹⁹ = 21111806459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112330727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481513 + ... + 523525.

It is an arithmetic number, because the mean of its divisors is an integer number (2672930680).

Almost surely, 2^21112330747 is an apocalyptic number.

21112330747 is a deficient number, since it is larger than the sum of its proper divisors (271114693).

21112330747 is an equidigital number, since it uses as much as digits as its factorization.

21112330747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48453.

The product of its (nonzero) digits is 7056, while the sum is 31.

Adding to 21112330747 its reverse (74703321112), we get a palindrome (95815651859).

The spelling of 21112330747 in words is "twenty-one billion, one hundred twelve million, three hundred thirty thousand, seven hundred forty-seven".