20988557132973 has 8 divisors (see below), whose sum is σ = 27984785295936. Its totient is φ = 13992350196000.

The previous prime is 20988557132903. The next prime is 20988557132989. The reversal of 20988557132973 is 37923175588902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20988557132973 - 2⁸ = 20988557132717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20988557132898 and 20988557132907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988557132903) 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 in 7 ways as a sum of consecutive naturals, for example, 2834793 + ... + 7071998.

It is an arithmetic number, because the mean of its divisors is an integer number (3498098161992).

Almost surely, 2^{20988557132973} is an apocalyptic number.

It is an amenable number.

20988557132973 is a deficient number, since it is larger than the sum of its proper divisors (6996228162963).

20988557132973 is an equidigital number, since it uses as much as digits as its factorization.

20988557132973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10612995.

The product of its (nonzero) digits is 228614400, while the sum is 69.

The spelling of 20988557132973 in words is "twenty trillion, nine hundred eighty-eight billion, five hundred fifty-seven million, one hundred thirty-two thousand, nine hundred seventy-three".