20988557132903 has 2 divisors, whose sum is σ = 20988557132904. Its totient is φ = 20988557132902.

The previous prime is 20988557132899. The next prime is 20988557132989. The reversal of 20988557132903 is 30923175588902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20988557132903 - 2² = 20988557132899 is a prime.

It is a super-2 number, since 2×20988557132903² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20988557132203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10494278566451 + 10494278566452.

It is an arithmetic number, because the mean of its divisors is an integer number (10494278566452).

Almost surely, 2^{20988557132903} is an apocalyptic number.

20988557132903 is a deficient number, since it is larger than the sum of its proper divisors (1).

20988557132903 is an equidigital number, since it uses as much as digits as its factorization.

20988557132903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 20988557132903 in words is "twenty trillion, nine hundred eighty-eight billion, five hundred fifty-seven million, one hundred thirty-two thousand, nine hundred three".