20841000705 has 192 divisors, whose sum is σ = 44742297600. Its totient is φ = 9297747648.

The previous prime is 20841000671. The next prime is 20841000707. The reversal of 20841000705 is 50700014802.

It is not a de Polignac number, because 20841000705 - 2⁷ = 20841000577 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20841000707) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17919454 + ... + 17920616.

It is an arithmetic number, because the mean of its divisors is an integer number (233032800).

Almost surely, 2^20841000705 is an apocalyptic number.

20841000705 is the 83349-th octagonal number.

It is an amenable number.

20841000705 is an abundant number, since it is smaller than the sum of its proper divisors (23901296895).

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

20841000705 is an equidigital number, since it uses as much as digits as its factorization.

20841000705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The spelling of 20841000705 in words is "twenty billion, eight hundred forty-one million, seven hundred five", and thus it is an aban number.