21710958199 has 16 divisors (see below), whose sum is σ = 25680916800. Its totient is φ = 17958737664.

The previous prime is 21710958197. The next prime is 21710958259. The reversal of 21710958199 is 99185901712.

It is not a de Polignac number, because 21710958199 - 2¹ = 21710958197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710958193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 398469 + ... + 449665.

It is an arithmetic number, because the mean of its divisors is an integer number (1605057300).

Almost surely, 2^21710958199 is an apocalyptic number.

21710958199 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21710958199 is a deficient number, since it is larger than the sum of its proper divisors (3969958601).

21710958199 is a wasteful number, since it uses less digits than its factorization.

21710958199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53322.

The product of its (nonzero) digits is 408240, while the sum is 52.

The spelling of 21710958199 in words is "twenty-one billion, seven hundred ten million, nine hundred fifty-eight thousand, one hundred ninety-nine".