21843102320429 has 4 divisors (see below), whose sum is σ = 23523340960476. Its totient is φ = 20162863680384.

The previous prime is 21843102320419. The next prime is 21843102320441. The reversal of 21843102320429 is 92402320134812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5881119710404 + 15961982610025 = 2425102^2 + 3995245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21843102320429 is a prime.

It is a super-2 number, since 2×21843102320429² (a number of 27 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 (21843102320419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840119320004 + ... + 840119320029.

It is an arithmetic number, because the mean of its divisors is an integer number (5880835240119).

Almost surely, 2^{21843102320429} is an apocalyptic number.

It is an amenable number.

21843102320429 is a deficient number, since it is larger than the sum of its proper divisors (1680238640047).

21843102320429 is a wasteful number, since it uses less digits than its factorization.

21843102320429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680238640046.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 21843102320429 in words is "twenty-one trillion, eight hundred forty-three billion, one hundred two million, three hundred twenty thousand, four hundred twenty-nine".