20828586155 has 8 divisors (see below), whose sum is σ = 26916942192. Its totient is φ = 15381109728.

The previous prime is 20828586151. The next prime is 20828586173. The reversal of 20828586155 is 55168582802.

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 20828586155 - 2² = 20828586151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20828586151) 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, 160219829 + ... + 160219958.

It is an arithmetic number, because the mean of its divisors is an integer number (3364617774).

Almost surely, 2^20828586155 is an apocalyptic number.

20828586155 is a deficient number, since it is larger than the sum of its proper divisors (6088356037).

20828586155 is a wasteful number, since it uses less digits than its factorization.

20828586155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320439805.

The product of its (nonzero) digits is 1536000, while the sum is 50.

The spelling of 20828586155 in words is "twenty billion, eight hundred twenty-eight million, five hundred eighty-six thousand, one hundred fifty-five".