20145256255 has 16 divisors (see below), whose sum is σ = 25647022080. Its totient is φ = 15147754272.

The previous prime is 20145256247. The next prime is 20145256297. The reversal of 20145256255 is 55265254102.

It is a cyclic number.

It is not a de Polignac number, because 20145256255 - 2³ = 20145256247 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822799 + ... + 846928.

It is an arithmetic number, because the mean of its divisors is an integer number (1602938880).

Almost surely, 2^20145256255 is an apocalyptic number.

20145256255 is a deficient number, since it is larger than the sum of its proper divisors (5501765825).

20145256255 is a wasteful number, since it uses less digits than its factorization.

20145256255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669878.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 20145256255 in words is "twenty billion, one hundred forty-five million, two hundred fifty-six thousand, two hundred fifty-five".