2021541923808 has 192 divisors, whose sum is σ = 6485341040640. Its totient is φ = 612588113280.

The previous prime is 2021541923749. The next prime is 2021541923827. The reversal of 2021541923808 is 8083291451202.

2021541923808 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 541 + 9 + 23 + 80 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271041 + ... + 2028927.

It is an arithmetic number, because the mean of its divisors is an integer number (33777817920).

Almost surely, 2^{2021541923808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021541923808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3242670520320).

2021541923808 is an abundant number, since it is smaller than the sum of its proper divisors (4463799116832).

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

2021541923808 is a wasteful number, since it uses less digits than its factorization.

2021541923808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757939 (or 1757903 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 2021541923808 in words is "two trillion, twenty-one billion, five hundred forty-one million, nine hundred twenty-three thousand, eight hundred eight".