210168716420 has 24 divisors (see below), whose sum is σ = 475304636184. Its totient is φ = 77600756736.

The previous prime is 210168716411. The next prime is 210168716431. The reversal of 210168716420 is 24617861012.

It can be written as a sum of positive squares in 4 ways, for example, as 25321024 + 210143395396 = 5032^2 + 458414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404170349 + ... + 404170868.

It is an arithmetic number, because the mean of its divisors is an integer number (19804359841).

Almost surely, 2^210168716420 is an apocalyptic number.

210168716420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210168716420 is an abundant number, since it is smaller than the sum of its proper divisors (265135919764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210168716420 is a wasteful number, since it uses less digits than its factorization.

210168716420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808341239 (or 808341237 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 210168716420 in words is "two hundred ten billion, one hundred sixty-eight million, seven hundred sixteen thousand, four hundred twenty".