210345021869 has 4 divisors (see below), whose sum is σ = 210629657280. Its totient is φ = 210060386460.

The previous prime is 210345021853. The next prime is 210345021871. The reversal of 210345021869 is 968120543012.

210345021869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210345021869 - 2⁴ = 210345021853 is a prime.

It is a super-2 number, since 2×210345021869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210345021769) 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 3 ways as a sum of consecutive naturals, for example, 142316597 + ... + 142318074.

It is an arithmetic number, because the mean of its divisors is an integer number (52657414320).

Almost surely, 2^210345021869 is an apocalyptic number.

It is an amenable number.

210345021869 is a deficient number, since it is larger than the sum of its proper divisors (284635411).

210345021869 is an equidigital number, since it uses as much as digits as its factorization.

210345021869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284635410.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 210345021869 in words is "two hundred ten billion, three hundred forty-five million, twenty-one thousand, eight hundred sixty-nine".