20251749029 has 2 divisors, whose sum is σ = 20251749030. Its totient is φ = 20251749028.

The previous prime is 20251748999. The next prime is 20251749041. The reversal of 20251749029 is 92094715202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16314186529 + 3937562500 = 127727^2 + 62750^2 .

It is a cyclic number.

It is not a de Polignac number, because 20251749029 - 2¹⁶ = 20251683493 is a prime.

It is a super-3 number, since 3×20251749029³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20251749079) 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 as a sum of consecutive naturals, namely, 10125874514 + 10125874515.

It is an arithmetic number, because the mean of its divisors is an integer number (10125874515).

Almost surely, 2^20251749029 is an apocalyptic number.

It is an amenable number.

20251749029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20251749029 is an equidigital number, since it uses as much as digits as its factorization.

20251749029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 20251749029 in words is "twenty billion, two hundred fifty-one million, seven hundred forty-nine thousand, twenty-nine".