20400116963255 has 8 divisors (see below), whose sum is σ = 24482921294832. Its totient is φ = 16318239611328.

The previous prime is 20400116963221. The next prime is 20400116963257. The reversal of 20400116963255 is 55236961100402.

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 20400116963255 - 2¹⁰ = 20400116962231 is a prime.

It is a super-2 number, since 2×20400116963255² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400116963257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231696494 + ... + 231784523.

It is an arithmetic number, because the mean of its divisors is an integer number (3060365161854).

Almost surely, 2^{20400116963255} is an apocalyptic number.

20400116963255 is a deficient number, since it is larger than the sum of its proper divisors (4082804331577).

20400116963255 is an equidigital number, since it uses as much as digits as its factorization.

20400116963255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463489825.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 20400116963255 in words is "twenty trillion, four hundred billion, one hundred sixteen million, nine hundred sixty-three thousand, two hundred fifty-five".