20894512320000 has 1800 divisors, whose sum is σ = 87724871842608. Its totient is φ = 4766023680000.

The previous prime is 20894512319999. The next prime is 20894512320007. The reversal of 20894512320000 is 2321549802.

It is a happy number.

20894512320000 is a `hidden beast` number, since 20 + 8 + 94 + 512 + 32 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1800).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20894512320007) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 5924158237 + ... + 5924161763.

Almost surely, 2^{20894512320000} is an apocalyptic number.

20894512320000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20894512320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43862435921304).

20894512320000 is an abundant number, since it is smaller than the sum of its proper divisors (66830359522608).

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

20894512320000 is a wasteful number, since it uses less digits than its factorization.

20894512320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 20894512320000 its reverse (2321549802), we get a palindrome (20896833869802).

The spelling of 20894512320000 in words is "twenty trillion, eight hundred ninety-four billion, five hundred twelve million, three hundred twenty thousand".