20828822387 has 2 divisors, whose sum is σ = 20828822388. Its totient is φ = 20828822386.

The previous prime is 20828822369. The next prime is 20828822423. The reversal of 20828822387 is 78322882802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20828822387 - 2¹² = 20828818291 is a prime.

It is not a weakly prime, because it can be changed into another prime (20828522387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10414411193 + 10414411194.

It is an arithmetic number, because the mean of its divisors is an integer number (10414411194).

Almost surely, 2^20828822387 is an apocalyptic number.

20828822387 is a deficient number, since it is larger than the sum of its proper divisors (1).

20828822387 is an equidigital number, since it uses as much as digits as its factorization.

20828822387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1376256, while the sum is 50.

The spelling of 20828822387 in words is "twenty billion, eight hundred twenty-eight million, eight hundred twenty-two thousand, three hundred eighty-seven".