21100044676 has 12 divisors (see below), whose sum is σ = 37825690140. Its totient is φ = 10292704640.

The previous prime is 21100044607. The next prime is 21100044677. The reversal of 21100044676 is 67644000112.

It can be written as a sum of positive squares in 2 ways, for example, as 3865606276 + 17234438400 = 62174^2 + 131280^2 .

It is not an unprimeable number, because it can be changed into a prime (21100044677) 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, 64329241 + ... + 64329568.

It is an arithmetic number, because the mean of its divisors is an integer number (3152140845).

Almost surely, 2^21100044676 is an apocalyptic number.

It is an amenable number.

21100044676 is a deficient number, since it is larger than the sum of its proper divisors (16725645464).

21100044676 is a wasteful number, since it uses less digits than its factorization.

21100044676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128658854 (or 128658852 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 21100044676 its reverse (67644000112), we get a palindrome (88744044788).

The spelling of 21100044676 in words is "twenty-one billion, one hundred million, forty-four thousand, six hundred seventy-six".