20898224251 has 2 divisors, whose sum is σ = 20898224252. Its totient is φ = 20898224250.

The previous prime is 20898224213. The next prime is 20898224257. The reversal of 20898224251 is 15242289802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20898224251 - 2⁹ = 20898223739 is a prime.

It is a super-2 number, since 2×20898224251² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20898224198 and 20898224207.

It is not a weakly prime, because it can be changed into another prime (20898224257) 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 as a sum of consecutive naturals, namely, 10449112125 + 10449112126.

It is an arithmetic number, because the mean of its divisors is an integer number (10449112126).

Almost surely, 2^20898224251 is an apocalyptic number.

20898224251 is a deficient number, since it is larger than the sum of its proper divisors (1).

20898224251 is an equidigital number, since it uses as much as digits as its factorization.

20898224251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 20898224251 in words is "twenty billion, eight hundred ninety-eight million, two hundred twenty-four thousand, two hundred fifty-one".