20885040000 has 800 divisors, whose sum is σ = 85016879640. Its totient is φ = 5045760000.

The previous prime is 20885039983. The next prime is 20885040067. The reversal of 20885040000 is 4058802.

20885040000 is a `hidden beast` number, since 208 + 8 + 50 + 400 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (800).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 71279854 + ... + 71280146.

Almost surely, 2^20885040000 is an apocalyptic number.

20885040000 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 20885040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42508439820).

20885040000 is an abundant number, since it is smaller than the sum of its proper divisors (64131839640).

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

20885040000 is an equidigital number, since it uses as much as digits as its factorization.

20885040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

Adding to 20885040000 its reverse (4058802), we get a palindrome (20889098802).

The spelling of 20885040000 in words is "twenty billion, eight hundred eighty-five million, forty thousand".