2021816351423 has 16 divisors (see below), whose sum is σ = 2324046013440. Its totient is φ = 1739519971200.

The previous prime is 2021816351407. The next prime is 2021816351441. The reversal of 2021816351423 is 3241536181202.

It is not a de Polignac number, because 2021816351423 - 2⁴ = 2021816351407 is a prime.

It is a super-3 number, since 3×2021816351423³ (a number of 38 digits) contains 333 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 (2021816351453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4673690 + ... + 5087927.

It is an arithmetic number, because the mean of its divisors is an integer number (145252875840).

Almost surely, 2^{2021816351423} is an apocalyptic number.

2021816351423 is a deficient number, since it is larger than the sum of its proper divisors (302229662017).

2021816351423 is a wasteful number, since it uses less digits than its factorization.

2021816351423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9762638.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 2021816351423 in words is "two trillion, twenty-one billion, eight hundred sixteen million, three hundred fifty-one thousand, four hundred twenty-three".