21100160747 has 16 divisors (see below), whose sum is σ = 21767356800. Its totient is φ = 20440580160.

The previous prime is 21100160743. The next prime is 21100160749. The reversal of 21100160747 is 74706100112.

It is a cyclic number.

It is not a de Polignac number, because 21100160747 - 2² = 21100160743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100160743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6302528 + ... + 6305874.

It is an arithmetic number, because the mean of its divisors is an integer number (1360459800).

Almost surely, 2^21100160747 is an apocalyptic number.

21100160747 is a deficient number, since it is larger than the sum of its proper divisors (667196053).

21100160747 is a wasteful number, since it uses less digits than its factorization.

21100160747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426.

The product of its (nonzero) digits is 2352, while the sum is 29.

Adding to 21100160747 its reverse (74706100112), we get a palindrome (95806260859).

The spelling of 21100160747 in words is "twenty-one billion, one hundred million, one hundred sixty thousand, seven hundred forty-seven".