21140022203423 has 4 divisors (see below), whose sum is σ = 21142217210688. Its totient is φ = 21137827196160.

The previous prime is 21140022203411. The next prime is 21140022203471. The reversal of 21140022203423 is 32430222004112.

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

It is a cyclic number.

It is not a de Polignac number, because 21140022203423 - 2⁶ = 21140022203359 is a prime.

It is a super-2 number, since 2×21140022203423² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21140022203392 and 21140022203401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140022202423) 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, 1097489186 + ... + 1097508447.

It is an arithmetic number, because the mean of its divisors is an integer number (5285554302672).

Almost surely, 2^{21140022203423} is an apocalyptic number.

21140022203423 is a deficient number, since it is larger than the sum of its proper divisors (2195007265).

21140022203423 is an equidigital number, since it uses as much as digits as its factorization.

21140022203423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195007264.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21140022203423 its reverse (32430222004112), we get a palindrome (53570244207535).

The spelling of 21140022203423 in words is "twenty-one trillion, one hundred forty billion, twenty-two million, two hundred three thousand, four hundred twenty-three".