20251144291 has 16 divisors (see below), whose sum is σ = 23623142400. Its totient is φ = 17353238280.

The previous prime is 20251144267. The next prime is 20251144301. The reversal of 20251144291 is 19244115202.

It is not a de Polignac number, because 20251144291 - 2⁹ = 20251143779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20251144241) by changing a digit.

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, 1759686 + ... + 1771156.

It is an arithmetic number, because the mean of its divisors is an integer number (1476446400).

Almost surely, 2^20251144291 is an apocalyptic number.

20251144291 is a deficient number, since it is larger than the sum of its proper divisors (3371998109).

20251144291 is an equidigital number, since it uses as much as digits as its factorization.

20251144291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16639 (or 16625 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 20251144291 its reverse (19244115202), we get a palindrome (39495259493).

The spelling of 20251144291 in words is "twenty billion, two hundred fifty-one million, one hundred forty-four thousand, two hundred ninety-one".