20727969159 has 16 divisors (see below), whose sum is σ = 28021646304. Its totient is φ = 13626547200.

The previous prime is 20727969137. The next prime is 20727969167. The reversal of 20727969159 is 95196972702.

It is not a de Polignac number, because 20727969159 - 2³³ = 12138034567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20727969099 and 20727969108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727969109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2080129 + ... + 2090069.

It is an arithmetic number, because the mean of its divisors is an integer number (1751352894).

Almost surely, 2^20727969159 is an apocalyptic number.

20727969159 is a deficient number, since it is larger than the sum of its proper divisors (7293677145).

20727969159 is an equidigital number, since it uses as much as digits as its factorization.

20727969159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19538.

The product of its (nonzero) digits is 4286520, while the sum is 57.

The spelling of 20727969159 in words is "twenty billion, seven hundred twenty-seven million, nine hundred sixty-nine thousand, one hundred fifty-nine".