25205030535234 has 128 divisors (see below), whose sum is σ = 58242425472000. Its totient is φ = 7191620225280.

The previous prime is 25205030535233. The next prime is 25205030535277. The reversal of 25205030535234 is 43253503050252.

It is a junction number, because it is equal to n+sod(n) for n = 25205030535192 and 25205030535201.

It is not an unprimeable number, because it can be changed into a prime (25205030535233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134263524 + ... + 134451120.

It is an arithmetic number, because the mean of its divisors is an integer number (455018949000).

Almost surely, 2^{25205030535234} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25205030535234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29121212736000).

25205030535234 is an abundant number, since it is smaller than the sum of its proper divisors (33037394936766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25205030535234 is a wasteful number, since it uses less digits than its factorization.

25205030535234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188288.

The product of its (nonzero) digits is 540000, while the sum is 39.

Adding to 25205030535234 its reverse (43253503050252), we get a palindrome (68458533585486).

The spelling of 25205030535234 in words is "twenty-five trillion, two hundred five billion, thirty million, five hundred thirty-five thousand, two hundred thirty-four".