20168502855 has 8 divisors (see below), whose sum is σ = 32269604592. Its totient is φ = 10756534848.

The previous prime is 20168502833. The next prime is 20168502859. The reversal of 20168502855 is 55820586102.

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

It is not a de Polignac number, because 20168502855 - 2¹⁸ = 20168240711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168502859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672283414 + ... + 672283443.

It is an arithmetic number, because the mean of its divisors is an integer number (4033700574).

Almost surely, 2^20168502855 is an apocalyptic number.

20168502855 is a deficient number, since it is larger than the sum of its proper divisors (12101101737).

20168502855 is a wasteful number, since it uses less digits than its factorization.

20168502855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344566865.

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 20168502855 in words is "twenty billion, one hundred sixty-eight million, five hundred two thousand, eight hundred fifty-five".