25023142021 has 4 divisors (see below), whose sum is σ = 25127841600. Its totient is φ = 24918442444.

The previous prime is 25023142003. The next prime is 25023142049. The reversal of 25023142021 is 12024132052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25023142021 - 2¹³ = 25023133829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25023141983 and 25023142001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25023142421) 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, 52349431 + ... + 52349908.

It is an arithmetic number, because the mean of its divisors is an integer number (6281960400).

Almost surely, 2^25023142021 is an apocalyptic number.

It is an amenable number.

25023142021 is a deficient number, since it is larger than the sum of its proper divisors (104699579).

25023142021 is a wasteful number, since it uses less digits than its factorization.

25023142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104699578.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 25023142021 its reverse (12024132052), we get a palindrome (37047274073).

The spelling of 25023142021 in words is "twenty-five billion, twenty-three million, one hundred forty-two thousand, twenty-one".