20250240172640 has 96 divisors (see below), whose sum is σ = 48131486583264. Its totient is φ = 8051047280640.

The previous prime is 20250240172609. The next prime is 20250240172733. The reversal of 20250240172640 is 4627104205202.

It is a self number, because there is not a number n which added to its sum of digits gives 20250240172640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25160132 + ... + 25952508.

It is an arithmetic number, because the mean of its divisors is an integer number (501369651909).

Almost surely, 2^{20250240172640} is an apocalyptic number.

20250240172640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20250240172640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24065743291632).

20250240172640 is an abundant number, since it is smaller than the sum of its proper divisors (27881246410624).

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

20250240172640 is a wasteful number, since it uses less digits than its factorization.

20250240172640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793360 (or 793352 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 20250240172640 its reverse (4627104205202), we get a palindrome (24877344377842).

The spelling of 20250240172640 in words is "twenty trillion, two hundred fifty billion, two hundred forty million, one hundred seventy-two thousand, six hundred forty".