25423734923 has 4 divisors (see below), whose sum is σ = 26919248760. Its totient is φ = 23928221088.

The previous prime is 25423734913. The next prime is 25423734937. The reversal of 25423734923 is 32943732452.

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 25423734923 - 2⁸ = 25423734667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25423734913) 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, 747756893 + ... + 747756926.

It is an arithmetic number, because the mean of its divisors is an integer number (6729812190).

Almost surely, 2^25423734923 is an apocalyptic number.

25423734923 is a deficient number, since it is larger than the sum of its proper divisors (1495513837).

25423734923 is a wasteful number, since it uses less digits than its factorization.

25423734923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495513836.

The product of its digits is 1088640, while the sum is 44.

The spelling of 25423734923 in words is "twenty-five billion, four hundred twenty-three million, seven hundred thirty-four thousand, nine hundred twenty-three".