20828843527 has 4 divisors (see below), whose sum is σ = 20894549976. Its totient is φ = 20763137080.

The previous prime is 20828843509. The next prime is 20828843531. The reversal of 20828843527 is 72534882802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72534882802 = 2 ⋅36267441401.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20828843527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20828843557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32852749 + ... + 32853382.

It is an arithmetic number, because the mean of its divisors is an integer number (5223637494).

Almost surely, 2^20828843527 is an apocalyptic number.

20828843527 is a deficient number, since it is larger than the sum of its proper divisors (65706449).

20828843527 is an equidigital number, since it uses as much as digits as its factorization.

20828843527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65706448.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 20828843527 in words is "twenty billion, eight hundred twenty-eight million, eight hundred forty-three thousand, five hundred twenty-seven".