10402440423 has 4 divisors (see below), whose sum is σ = 13869920568. Its totient is φ = 6934960280.

The previous prime is 10402440421. The next prime is 10402440427. The reversal of 10402440423 is 32404420401.

It is a happy number.

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 10402440423 - 2¹ = 10402440421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10402440393 and 10402440402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402440421) 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, 1733740068 + ... + 1733740073.

It is an arithmetic number, because the mean of its divisors is an integer number (3467480142).

Almost surely, 2^10402440423 is an apocalyptic number.

10402440423 is a deficient number, since it is larger than the sum of its proper divisors (3467480145).

10402440423 is an equidigital number, since it uses as much as digits as its factorization.

10402440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3467480144.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 10402440423 its reverse (32404420401), we get a palindrome (42806860824).

The spelling of 10402440423 in words is "ten billion, four hundred two million, four hundred forty thousand, four hundred twenty-three".