20844001897200 has 90 divisors (see below), whose sum is σ = 72334476596304. Its totient is φ = 5558400504960.

The previous prime is 20844001897177. The next prime is 20844001897259. The reversal of 20844001897200 is 279810044802.

20844001897200 is a `hidden beast` number, since 2 + 0 + 8 + 440 + 0 + 189 + 7 + 20 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (90).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 2894996664 + ... + 2895003863.

Almost surely, 2^{20844001897200} is an apocalyptic number.

20844001897200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20844001897200 is an abundant number, since it is smaller than the sum of its proper divisors (51490474699104).

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

20844001897200 is a wasteful number, since it uses less digits than its factorization.

20844001897200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790000551 (or 5790000537 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 20844001897200 in words is "twenty trillion, eight hundred forty-four billion, one million, eight hundred ninety-seven thousand, two hundred".