20841755994 has 96 divisors (see below), whose sum is σ = 48191457600. Its totient is φ = 6491197440.

The previous prime is 20841755971. The next prime is 20841756007. The reversal of 20841755994 is 49955714802.

It is a happy number.

20841755994 is a `hidden beast` number, since 2 + 0 + 8 + 41 + 7 + 5 + 599 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20841755994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7749402 + ... + 7752090.

It is an arithmetic number, because the mean of its divisors is an integer number (501994350).

Almost surely, 2^20841755994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20841755994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24095728800).

20841755994 is an abundant number, since it is smaller than the sum of its proper divisors (27349701606).

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

20841755994 is a wasteful number, since it uses less digits than its factorization.

20841755994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020 (or 3017 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The spelling of 20841755994 in words is "twenty billion, eight hundred forty-one million, seven hundred fifty-five thousand, nine hundred ninety-four".