25005030500 has 24 divisors (see below), whose sum is σ = 54610987704. Its totient is φ = 10002012000.

The previous prime is 25005030487. The next prime is 25005030509. The reversal of 25005030500 is 503050052.

It can be written as a sum of positive squares in 4 ways, for example, as 8075897956 + 16929132544 = 89866^2 + 130112^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (25005030509) 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, 25004531 + ... + 25005530.

It is an arithmetic number, because the mean of its divisors is an integer number (2275457821).

Almost surely, 2^25005030500 is an apocalyptic number.

25005030500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25005030500 is an abundant number, since it is smaller than the sum of its proper divisors (29605957204).

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

25005030500 is a wasteful number, since it uses less digits than its factorization.

25005030500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50010080 (or 50010068 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

Adding to 25005030500 its reverse (503050052), we get a palindrome (25508080552).

The spelling of 25005030500 in words is "twenty-five billion, five million, thirty thousand, five hundred".