20725765011455 has 16 divisors (see below), whose sum is σ = 29919901370880. Its totient is φ = 13463955616032.

The previous prime is 20725765011449. The next prime is 20725765011463. The reversal of 20725765011455 is 55411056752702.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20725765011455 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15583281299 + ... + 15583282628.

It is an arithmetic number, because the mean of its divisors is an integer number (1869993835680).

Almost surely, 2^{20725765011455} is an apocalyptic number.

20725765011455 is a deficient number, since it is larger than the sum of its proper divisors (9194136359425).

20725765011455 is a wasteful number, since it uses less digits than its factorization.

20725765011455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31166563958.

The product of its (nonzero) digits is 2940000, while the sum is 50.

The spelling of 20725765011455 in words is "twenty trillion, seven hundred twenty-five billion, seven hundred sixty-five million, eleven thousand, four hundred fifty-five".