25209004234 has 8 divisors (see below), whose sum is σ = 40037830308. Its totient is φ = 11863060800.

The previous prime is 25209004231. The next prime is 25209004237. The reversal of 25209004234 is 43240090252.

It is an interprime number because it is at equal distance from previous prime (25209004231) and next prime (25209004237).

It can be written as a sum of positive squares in 2 ways, for example, as 24962420025 + 246584209 = 157995^2 + 15703^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25209004196 and 25209004205.

It is not an unprimeable number, because it can be changed into a prime (25209004231) 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, 370720617 + ... + 370720684.

Almost surely, 2^25209004234 is an apocalyptic number.

25209004234 is a deficient number, since it is larger than the sum of its proper divisors (14828826074).

25209004234 is a wasteful number, since it uses less digits than its factorization.

25209004234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741441320.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 25209004234 its reverse (43240090252), we get a palindrome (68449094486).

The spelling of 25209004234 in words is "twenty-five billion, two hundred nine million, four thousand, two hundred thirty-four".