21100305032 has 8 divisors (see below), whose sum is σ = 39563071950. Its totient is φ = 10550152512.

The previous prime is 21100305029. The next prime is 21100305071. The reversal of 21100305032 is 23050300112.

It can be written as a sum of positive squares in only one way, i.e., 13099718116 + 8000586916 = 114454^2 + 89446^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21100305032.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318769057 + ... + 1318769072.

Almost surely, 2^21100305032 is an apocalyptic number.

It is an amenable number.

21100305032 is a deficient number, since it is larger than the sum of its proper divisors (18462766918).

21100305032 is a wasteful number, since it uses less digits than its factorization.

21100305032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637538135 (or 2637538131 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

Adding to 21100305032 its reverse (23050300112), we get a palindrome (44150605144).

The spelling of 21100305032 in words is "twenty-one billion, one hundred million, three hundred five thousand, thirty-two".