20889671155 has 8 divisors (see below), whose sum is σ = 25369625232. Its totient is φ = 16510390368.

The previous prime is 20889671147. The next prime is 20889671197. The reversal of 20889671155 is 55117698802.

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 20889671155 - 2³ = 20889671147 is a prime.

It is a Duffinian 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, 25167864 + ... + 25168693.

It is an arithmetic number, because the mean of its divisors is an integer number (3171203154).

Almost surely, 2^20889671155 is an apocalyptic number.

20889671155 is a deficient number, since it is larger than the sum of its proper divisors (4479954077).

20889671155 is an equidigital number, since it uses as much as digits as its factorization.

20889671155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50336645.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 20889671155 in words is "twenty billion, eight hundred eighty-nine million, six hundred seventy-one thousand, one hundred fifty-five".