21041400313423 has 12 divisors (see below), whose sum is σ = 24484604017080. Its totient is φ = 18029684795472.

The previous prime is 21041400313369. The next prime is 21041400313481. The reversal of 21041400313423 is 32431300414012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21041400313423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21041400313391 and 21041400313400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041400313523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68907861 + ... + 69212542.

It is an arithmetic number, because the mean of its divisors is an integer number (2040383668090).

Almost surely, 2^{21041400313423} is an apocalyptic number.

21041400313423 is a deficient number, since it is larger than the sum of its proper divisors (3443203703657).

21041400313423 is a wasteful number, since it uses less digits than its factorization.

21041400313423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138123526 (or 138123519 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21041400313423 its reverse (32431300414012), we get a palindrome (53472700727435).

The spelling of 21041400313423 in words is "twenty-one trillion, forty-one billion, four hundred million, three hundred thirteen thousand, four hundred twenty-three".