20845299870790 has 32 divisors (see below), whose sum is σ = 39366861431040. Its totient is φ = 7936867209600.

The previous prime is 20845299870767. The next prime is 20845299870797. The reversal of 20845299870790 is 9707899254802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20845299870797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551152425 + ... + 551190244.

It is an arithmetic number, because the mean of its divisors is an integer number (1230214419720).

Almost surely, 2^{20845299870790} is an apocalyptic number.

20845299870790 is a deficient number, since it is larger than the sum of its proper divisors (18521561560250).

20845299870790 is a wasteful number, since it uses less digits than its factorization.

20845299870790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102342768.

The product of its (nonzero) digits is 182891520, while the sum is 70.

The spelling of 20845299870790 in words is "twenty trillion, eight hundred forty-five billion, two hundred ninety-nine million, eight hundred seventy thousand, seven hundred ninety".