20250784106257 has 4 divisors (see below), whose sum is σ = 20250808427520. Its totient is φ = 20250759784996.

The previous prime is 20250784106251. The next prime is 20250784106297. The reversal of 20250784106257 is 75260148705202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20250784106257 - 2³ = 20250784106249 is a prime.

It is a super-2 number, since 2×20250784106257² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20250784106257.

It is not an unprimeable number, because it can be changed into a prime (20250784106251) 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 3 ways as a sum of consecutive naturals, for example, 10865713 + ... + 12592270.

It is an arithmetic number, because the mean of its divisors is an integer number (5062702106880).

Almost surely, 2^{20250784106257} is an apocalyptic number.

It is an amenable number.

20250784106257 is a deficient number, since it is larger than the sum of its proper divisors (24321263).

20250784106257 is an equidigital number, since it uses as much as digits as its factorization.

20250784106257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24321262.

The product of its (nonzero) digits is 1881600, while the sum is 49.

The spelling of 20250784106257 in words is "twenty trillion, two hundred fifty billion, seven hundred eighty-four million, one hundred six thousand, two hundred fifty-seven".