20468827155 has 64 divisors (see below), whose sum is σ = 37889399808. Its totient is φ = 9242457600.

The previous prime is 20468827153. The next prime is 20468827187. The reversal of 20468827155 is 55172886402.

It is not a de Polignac number, because 20468827155 - 2¹ = 20468827153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20468827153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4950469 + ... + 4954601.

It is an arithmetic number, because the mean of its divisors is an integer number (592021872).

Almost surely, 2^20468827155 is an apocalyptic number.

20468827155 is a deficient number, since it is larger than the sum of its proper divisors (17420572653).

20468827155 is a wasteful number, since it uses less digits than its factorization.

20468827155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716.

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 20468827155 in words is "twenty billion, four hundred sixty-eight million, eight hundred twenty-seven thousand, one hundred fifty-five".