40123202423 has 4 divisors (see below), whose sum is σ = 40125324288. Its totient is φ = 40121080560.

The previous prime is 40123202393. The next prime is 40123202459. The reversal of 40123202423 is 32420232104.

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 40123202423 - 2⁶ = 40123202359 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 (40123202923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032311 + ... + 1070472.

It is an arithmetic number, because the mean of its divisors is an integer number (10031331072).

Almost surely, 2^40123202423 is an apocalyptic number.

40123202423 is a deficient number, since it is larger than the sum of its proper divisors (2121865).

40123202423 is a wasteful number, since it uses less digits than its factorization.

40123202423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121864.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 40123202423 its reverse (32420232104), we get a palindrome (72543434527).

The spelling of 40123202423 in words is "forty billion, one hundred twenty-three million, two hundred two thousand, four hundred twenty-three".