20938601255 has 32 divisors (see below), whose sum is σ = 31072688640. Its totient is φ = 13316849280.

The previous prime is 20938601239. The next prime is 20938601263. The reversal of 20938601255 is 55210683902.

It is not a de Polignac number, because 20938601255 - 2⁴ = 20938601239 is a prime.

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, 757067 + ... + 784236.

It is an arithmetic number, because the mean of its divisors is an integer number (971021520).

Almost surely, 2^20938601255 is an apocalyptic number.

20938601255 is a deficient number, since it is larger than the sum of its proper divisors (10134087385).

20938601255 is a wasteful number, since it uses less digits than its factorization.

20938601255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541351.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 20938601255 in words is "twenty billion, nine hundred thirty-eight million, six hundred one thousand, two hundred fifty-five".