20846242251 has 6 divisors (see below), whose sum is σ = 30111238820. Its totient is φ = 13897494828.

The previous prime is 20846242247. The next prime is 20846242259. The reversal of 20846242251 is 15224264802.

20846242251 is a `hidden beast` number, since 2 + 0 + 8 + 4 + 624 + 2 + 25 + 1 = 666.

It is not a de Polignac number, because 20846242251 - 2² = 20846242247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20846242259) 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 5 ways as a sum of consecutive naturals, for example, 1158124561 + ... + 1158124578.

Almost surely, 2^20846242251 is an apocalyptic number.

20846242251 is a deficient number, since it is larger than the sum of its proper divisors (9264996569).

20846242251 is a wasteful number, since it uses less digits than its factorization.

20846242251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316249145 (or 2316249142 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The spelling of 20846242251 in words is "twenty billion, eight hundred forty-six million, two hundred forty-two thousand, two hundred fifty-one".