20401234410223 has 2 divisors, whose sum is σ = 20401234410224. Its totient is φ = 20401234410222.

The previous prime is 20401234410209. The next prime is 20401234410229. The reversal of 20401234410223 is 32201443210402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20401234410223 - 2²⁹ = 20400697539311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20401234410191 and 20401234410200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20401234410229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200617205111 + 10200617205112.

It is an arithmetic number, because the mean of its divisors is an integer number (10200617205112).

Almost surely, 2^{20401234410223} is an apocalyptic number.

20401234410223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401234410223 is an equidigital number, since it uses as much as digits as its factorization.

20401234410223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 20401234410223 its reverse (32201443210402), we get a palindrome (52602677620625).

The spelling of 20401234410223 in words is "twenty trillion, four hundred one billion, two hundred thirty-four million, four hundred ten thousand, two hundred twenty-three".