20555513255 has 8 divisors (see below), whose sum is σ = 24667431552. Its totient is φ = 16443866848.

The previous prime is 20555513243. The next prime is 20555513347. The reversal of 20555513255 is 55231555502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20555513255 - 2⁴ = 20555513239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181802 + ... + 272328.

It is an arithmetic number, because the mean of its divisors is an integer number (3083428944).

Almost surely, 2^20555513255 is an apocalyptic number.

20555513255 is a deficient number, since it is larger than the sum of its proper divisors (4111918297).

20555513255 is an equidigital number, since it uses as much as digits as its factorization.

20555513255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135945.

The product of its (nonzero) digits is 187500, while the sum is 38.

The spelling of 20555513255 in words is "twenty billion, five hundred fifty-five million, five hundred thirteen thousand, two hundred fifty-five".