20997550080002 has 16 divisors (see below), whose sum is σ = 33371387146872. Its totient is φ = 9874581661440.

The previous prime is 20997550079963. The next prime is 20997550080037. The reversal of 20997550080002 is 20008005579902.

It can be written as a sum of positive squares in 4 ways, for example, as 17834413132561 + 3163136947441 = 4223081^2 + 1778521^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206772749 + ... + 206874272.

Almost surely, 2^{20997550080002} is an apocalyptic number.

20997550080002 is a deficient number, since it is larger than the sum of its proper divisors (12373837066870).

20997550080002 is a wasteful number, since it uses less digits than its factorization.

20997550080002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413648533.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 20997550080002 in words is "twenty trillion, nine hundred ninety-seven billion, five hundred fifty million, eighty thousand, two".