20825156982573 has 24 divisors (see below), whose sum is σ = 31851578718648. Its totient is φ = 13066215985152.

The previous prime is 20825156982571. The next prime is 20825156982631. The reversal of 20825156982573 is 37528965152802.

It is a happy number.

20825156982573 is a `hidden beast` number, since 2 + 0 + 8 + 2 + 5 + 1 + 56 + 9 + 8 + 2 + 573 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15574175566569 + 5250981416004 = 3946413^2 + 2291502^2 .

It is not a de Polignac number, because 20825156982573 - 2¹ = 20825156982571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20825156982573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825156982571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 807261 + ... + 6503997.

It is an arithmetic number, because the mean of its divisors is an integer number (1327149113277).

Almost surely, 2^{20825156982573} is an apocalyptic number.

It is an amenable number.

20825156982573 is a deficient number, since it is larger than the sum of its proper divisors (11026421736075).

20825156982573 is a wasteful number, since it uses less digits than its factorization.

20825156982573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5720653 (or 5720650 counting only the distinct ones).

The product of its (nonzero) digits is 72576000, while the sum is 63.

The spelling of 20825156982573 in words is "twenty trillion, eight hundred twenty-five billion, one hundred fifty-six million, nine hundred eighty-two thousand, five hundred seventy-three".