20355054231255 has 16 divisors (see below), whose sum is σ = 32575809917664. Its totient is φ = 10853454540800.

The previous prime is 20355054231137. The next prime is 20355054231271. The reversal of 20355054231255 is 55213245055302.

It is not a de Polignac number, because 20355054231255 - 2²⁰ = 20355053182679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160833546 + ... + 160960055.

It is an arithmetic number, because the mean of its divisors is an integer number (2035988119854).

Almost surely, 2^{20355054231255} is an apocalyptic number.

20355054231255 is a deficient number, since it is larger than the sum of its proper divisors (12220755686409).

20355054231255 is a wasteful number, since it uses less digits than its factorization.

20355054231255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321797826.

The product of its (nonzero) digits is 900000, while the sum is 42.

Adding to 20355054231255 its reverse (55213245055302), we get a palindrome (75568299286557).

The spelling of 20355054231255 in words is "twenty trillion, three hundred fifty-five billion, fifty-four million, two hundred thirty-one thousand, two hundred fifty-five".