20846849247225 has 189 divisors, whose sum is σ = 40084720319487. Its totient is φ = 10749801924000.

The previous prime is 20846849247193. The next prime is 20846849247271. The reversal of 20846849247225 is 52274294864802.

It is a happy number.

The square root of 20846849247225 is 4565835.

It is a perfect power (a square), and thus also a powerful number.

20846849247225 is a `hidden beast` number, since 2 + 0 + 84 + 6 + 8 + 492 + 47 + 2 + 25 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7504865729001 + 13341983518224 = 2739501^2 + 3652668^2 .

It is not a de Polignac number, because 20846849247225 - 2⁵ = 20846849247193 is a prime.

It is a super-2 number, since 2×20846849247225² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 19108018930 + ... + 19108020020.

Almost surely, 2^{20846849247225} is an apocalyptic number.

20846849247225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20846849247225 is the 4565835-th square number.

20846849247225 is the 2282918-th centered octagonal number.

It is an amenable number.

20846849247225 is a deficient number, since it is larger than the sum of its proper divisors (19237871072262).

20846849247225 is an frugal number, since it uses more digits than its factorization.

20846849247225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 123863040, while the sum is 63.

The spelling of 20846849247225 in words is "twenty trillion, eight hundred forty-six billion, eight hundred forty-nine million, two hundred forty-seven thousand, two hundred twenty-five".