25213421433 has 8 divisors (see below), whose sum is σ = 33764699200. Its totient is φ = 16735545648.

The previous prime is 25213421383. The next prime is 25213421447. The reversal of 25213421433 is 33412431252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25213421433 - 2⁶ = 25213421369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25213421433.

It is not an unprimeable number, because it can be changed into a prime (25213421473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18349693 + ... + 18351066.

It is an arithmetic number, because the mean of its divisors is an integer number (4220587400).

Almost surely, 2^25213421433 is an apocalyptic number.

It is an amenable number.

25213421433 is a deficient number, since it is larger than the sum of its proper divisors (8551277767).

25213421433 is a wasteful number, since it uses less digits than its factorization.

25213421433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36700991.

The product of its digits is 17280, while the sum is 30.

Adding to 25213421433 its reverse (33412431252), we get a palindrome (58625852685).

The spelling of 25213421433 in words is "twenty-five billion, two hundred thirteen million, four hundred twenty-one thousand, four hundred thirty-three".