10420431421423 has 4 divisors (see below), whose sum is σ = 10420440016168. Its totient is φ = 10420422826680.

The previous prime is 10420431421363. The next prime is 10420431421427. The reversal of 10420431421423 is 32412413402401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10420431421423 - 2¹⁷ = 10420431290351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10420431421427) 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, 2106393 + ... + 5027698.

It is an arithmetic number, because the mean of its divisors is an integer number (2605110004042).

Almost surely, 2^{10420431421423} is an apocalyptic number.

10420431421423 is a deficient number, since it is larger than the sum of its proper divisors (8594745).

10420431421423 is an equidigital number, since it uses as much as digits as its factorization.

10420431421423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8594744.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 10420431421423 its reverse (32412413402401), we get a palindrome (42832844823824).

The spelling of 10420431421423 in words is "ten trillion, four hundred twenty billion, four hundred thirty-one million, four hundred twenty-one thousand, four hundred twenty-three".