20842770084445 has 16 divisors (see below), whose sum is σ = 26482712764608. Its totient is φ = 15693300240640.

The previous prime is 20842770084443. The next prime is 20842770084469. The reversal of 20842770084445 is 54448007724802.

It is not a de Polignac number, because 20842770084445 - 2¹ = 20842770084443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20842770084443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20389590 + ... + 21387400.

It is an arithmetic number, because the mean of its divisors is an integer number (1655169547788).

Almost surely, 2^{20842770084445} is an apocalyptic number.

It is an amenable number.

20842770084445 is a deficient number, since it is larger than the sum of its proper divisors (5639942680163).

20842770084445 is a wasteful number, since it uses less digits than its factorization.

20842770084445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243580.

The product of its (nonzero) digits is 16056320, while the sum is 55.

The spelling of 20842770084445 in words is "twenty trillion, eight hundred forty-two billion, seven hundred seventy million, eighty-four thousand, four hundred forty-five".