20496217225 has 81 divisors (see below), whose sum is σ = 29700306741. Its totient is φ = 14018716800.

The previous prime is 20496217211. The next prime is 20496217237. The reversal of 20496217225 is 52271269402.

The square root of 20496217225 is 143165.

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

It can be written as a sum of positive squares in 4 ways, for example, as 59799289 + 20436417936 = 7733^2 + 142956^2 .

It is not a de Polignac number, because 20496217225 - 2¹⁷ = 20496086153 is a prime.

It is an unprimeable number.

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 80 ways as a sum of consecutive naturals, for example, 149607357 + ... + 149607493.

Almost surely, 2^20496217225 is an apocalyptic number.

20496217225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20496217225 is the 143165-th square number.

20496217225 is the 71583-rd centered octagonal number.

It is an amenable number.

20496217225 is a deficient number, since it is larger than the sum of its proper divisors (9204089516).

20496217225 is a wasteful number, since it uses less digits than its factorization.

20496217225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 20496217225 in words is "twenty billion, four hundred ninety-six million, two hundred seventeen thousand, two hundred twenty-five".