20988460399 has 2 divisors, whose sum is σ = 20988460400. Its totient is φ = 20988460398.

The previous prime is 20988460397. The next prime is 20988460453. The reversal of 20988460399 is 99306488902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20988460399 - 2¹ = 20988460397 is a prime.

Together with 20988460397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20988460391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10494230199 + 10494230200.

It is an arithmetic number, because the mean of its divisors is an integer number (10494230200).

Almost surely, 2^20988460399 is an apocalyptic number.

20988460399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20988460399 is an equidigital number, since it uses as much as digits as its factorization.

20988460399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 58.

The spelling of 20988460399 in words is "twenty billion, nine hundred eighty-eight million, four hundred sixty thousand, three hundred ninety-nine".