20845422878356 has 24 divisors (see below), whose sum is σ = 37685461605120. Its totient is φ = 10078669809600.

The previous prime is 20845422878333. The next prime is 20845422878377. The reversal of 20845422878356 is 65387822454802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65048950 + ... + 65368621.

It is an arithmetic number, because the mean of its divisors is an integer number (1570227566880).

Almost surely, 2^{20845422878356} is an apocalyptic number.

It is an amenable number.

20845422878356 is a deficient number, since it is larger than the sum of its proper divisors (16840038726764).

20845422878356 is a wasteful number, since it uses less digits than its factorization.

20845422878356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130418895 (or 130418893 counting only the distinct ones).

The product of its (nonzero) digits is 206438400, while the sum is 64.

The spelling of 20845422878356 in words is "twenty trillion, eight hundred forty-five billion, four hundred twenty-two million, eight hundred seventy-eight thousand, three hundred fifty-six".