20251112550 has 48 divisors (see below), whose sum is σ = 50263820112. Its totient is φ = 5395881600.

The previous prime is 20251112501. The next prime is 20251112569. The reversal of 20251112550 is 5521115202.

It is a self number, because there is not a number n which added to its sum of digits gives 20251112550.

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 23 ways as a sum of consecutive naturals, for example, 130980 + ... + 240120.

It is an arithmetic number, because the mean of its divisors is an integer number (1047162919).

Almost surely, 2^20251112550 is an apocalyptic number.

20251112550 is an abundant number, since it is smaller than the sum of its proper divisors (30012707562).

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

20251112550 is a wasteful number, since it uses less digits than its factorization.

20251112550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110393 (or 110388 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 20251112550 its reverse (5521115202), we get a palindrome (25772227752).

The spelling of 20251112550 in words is "twenty billion, two hundred fifty-one million, one hundred twelve thousand, five hundred fifty".