25021266530 has 64 divisors (see below), whose sum is σ = 50284136448. Its totient is φ = 8901895680.

The previous prime is 25021266527. The next prime is 25021266533. The reversal of 25021266530 is 3566212052.

It is an interprime number because it is at equal distance from previous prime (25021266527) and next prime (25021266533).

It is not an unprimeable number, because it can be changed into a prime (25021266533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 925667 + ... + 952313.

It is an arithmetic number, because the mean of its divisors is an integer number (785689632).

Almost surely, 2^25021266530 is an apocalyptic number.

25021266530 is an abundant number, since it is smaller than the sum of its proper divisors (25262869918).

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

25021266530 is a wasteful number, since it uses less digits than its factorization.

25021266530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26931.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 25021266530 its reverse (3566212052), we get a palindrome (28587478582).

The spelling of 25021266530 in words is "twenty-five billion, twenty-one million, two hundred sixty-six thousand, five hundred thirty".