21100044699 has 10 divisors (see below), whose sum is σ = 31519819980. Its totient is φ = 14066696412.

The previous prime is 21100044677. The next prime is 21100044767. The reversal of 21100044699 is 99644000112.

It is a happy number.

21100044699 is a `hidden beast` number, since 21 + 100 + 0 + 446 + 99 = 666.

It is not a de Polignac number, because 21100044699 - 2¹⁹ = 21099520411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100044899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 130247109 + ... + 130247270.

It is an arithmetic number, because the mean of its divisors is an integer number (3151981998).

Almost surely, 2^21100044699 is an apocalyptic number.

21100044699 is a deficient number, since it is larger than the sum of its proper divisors (10419775281).

21100044699 is an equidigital number, since it uses as much as digits as its factorization.

21100044699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260494391 (or 260494382 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 21100044699 in words is "twenty-one billion, one hundred million, forty-four thousand, six hundred ninety-nine".