20423430400441 has 2 divisors, whose sum is σ = 20423430400442. Its totient is φ = 20423430400440.

The previous prime is 20423430400427. The next prime is 20423430400459. The reversal of 20423430400441 is 14400403432402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18769724419216 + 1653705981225 = 4332404^2 + 1285965^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423430400441 - 2⁹ = 20423430399929 is a prime.

It is a super-2 number, since 2×20423430400441² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20423430400411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211715200220 + 10211715200221.

It is an arithmetic number, because the mean of its divisors is an integer number (10211715200221).

Almost surely, 2^{20423430400441} is an apocalyptic number.

It is an amenable number.

20423430400441 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423430400441 is an equidigital number, since it uses as much as digits as its factorization.

20423430400441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 20423430400441 its reverse (14400403432402), we get a palindrome (34823833832843).

The spelling of 20423430400441 in words is "twenty trillion, four hundred twenty-three billion, four hundred thirty million, four hundred thousand, four hundred forty-one".