21973547635199 has 12 divisors (see below), whose sum is σ = 22971555294576. Its totient is φ = 21017171204832.

The previous prime is 21973547635157. The next prime is 21973547635213. The reversal of 21973547635199 is 99153674537912.

It is not a de Polignac number, because 21973547635199 - 2⁸ = 21973547634943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21973547605199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10202339 + ... + 12166955.

It is an arithmetic number, because the mean of its divisors is an integer number (1914296274548).

Almost surely, 2^{21973547635199} is an apocalyptic number.

21973547635199 is a deficient number, since it is larger than the sum of its proper divisors (998007659377).

21973547635199 is a wasteful number, since it uses less digits than its factorization.

21973547635199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985806 (or 1985783 counting only the distinct ones).

The product of its digits is 385786800, while the sum is 71.

The spelling of 21973547635199 in words is "twenty-one trillion, nine hundred seventy-three billion, five hundred forty-seven million, six hundred thirty-five thousand, one hundred ninety-nine".