25020140240 has 40 divisors (see below), whose sum is σ = 58179086568. Its totient is φ = 10006807040.

The previous prime is 25020140191. The next prime is 25020140267. The reversal of 25020140240 is 4204102052.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11285237824 + 13734902416 = 106232^2 + 117196^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 886994 + ... + 914766.

Almost surely, 2^25020140240 is an apocalyptic number.

25020140240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25020140240 is an abundant number, since it is smaller than the sum of its proper divisors (33158946328).

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

25020140240 is a wasteful number, since it uses less digits than its factorization.

25020140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39047 (or 39041 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 25020140240 its reverse (4204102052), we get a palindrome (29224242292).

The spelling of 25020140240 in words is "twenty-five billion, twenty million, one hundred forty thousand, two hundred forty".