20210205243399 has 32 divisors (see below), whose sum is σ = 27293076518400. Its totient is φ = 13300895900160.

The previous prime is 20210205243329. The next prime is 20210205243433. The reversal of 20210205243399 is 99334250201202.

It is not a de Polignac number, because 20210205243399 - 2¹¹ = 20210205241351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210205243399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210205243329) 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 31 ways as a sum of consecutive naturals, for example, 666702267 + ... + 666732579.

It is an arithmetic number, because the mean of its divisors is an integer number (852908641200).

Almost surely, 2^{20210205243399} is an apocalyptic number.

20210205243399 is a deficient number, since it is larger than the sum of its proper divisors (7082871275001).

20210205243399 is a wasteful number, since it uses less digits than its factorization.

20210205243399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34295.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 20210205243399 in words is "twenty trillion, two hundred ten billion, two hundred five million, two hundred forty-three thousand, three hundred ninety-nine".