20997873182160 has 240 divisors, whose sum is σ = 84095830450944. Its totient is φ = 4590839328768.

The previous prime is 20997873182129. The next prime is 20997873182207. The reversal of 20997873182160 is 6128137879902.

20997873182160 is a `hidden beast` number, since 2 + 0 + 99 + 78 + 7 + 318 + 2 + 160 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90454617 + ... + 90686456.

Almost surely, 2^{20997873182160} is an apocalyptic number.

20997873182160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20997873182160 is an abundant number, since it is smaller than the sum of its proper divisors (63097957268784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20997873182160 is a wasteful number, since it uses less digits than its factorization.

20997873182160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181141122 (or 181141113 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 20997873182160 in words is "twenty trillion, nine hundred ninety-seven billion, eight hundred seventy-three million, one hundred eighty-two thousand, one hundred sixty".