20780283072125 has 32 divisors (see below), whose sum is σ = 26268481075200. Its totient is φ = 16409785766400.

The previous prime is 20780283072113. The next prime is 20780283072209. The reversal of 20780283072125 is 52127038208702.

It is a de Polignac number, because none of the positive numbers 2^k-20780283072125 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20780283072125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40519052 + ... + 41028698.

It is an arithmetic number, because the mean of its divisors is an integer number (820890033600).

Almost surely, 2^{20780283072125} is an apocalyptic number.

20780283072125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20780283072125 is a deficient number, since it is larger than the sum of its proper divisors (5488198003075).

20780283072125 is an equidigital number, since it uses as much as digits as its factorization.

20780283072125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513870 (or 513860 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 20780283072125 in words is "twenty trillion, seven hundred eighty billion, two hundred eighty-three million, seventy-two thousand, one hundred twenty-five".