20001021002094 has 256 divisors, whose sum is σ = 47942242467840. Its totient is φ = 5491950336000.

The previous prime is 20001021002071. The next prime is 20001021002191. The reversal of 20001021002094 is 49020012010002.

It is a super-2 number, since 2×20001021002094² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001021002094.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 9945807549 + ... + 9945809559.

It is an arithmetic number, because the mean of its divisors is an integer number (187274384640).

Almost surely, 2^{20001021002094} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001021002094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23971121233920).

20001021002094 is an abundant number, since it is smaller than the sum of its proper divisors (27941221465746).

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

20001021002094 is a wasteful number, since it uses less digits than its factorization.

20001021002094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 20001021002094 its reverse (49020012010002), we get a palindrome (69021033012096).

The spelling of 20001021002094 in words is "twenty trillion, one billion, twenty-one million, two thousand, ninety-four".