20797416845 has 32 divisors (see below), whose sum is σ = 26992120320. Its totient is φ = 15336034560.

The previous prime is 20797416841. The next prime is 20797416847. The reversal of 20797416845 is 54861479702.

It is not a de Polignac number, because 20797416845 - 2² = 20797416841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20797416841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1798472 + ... + 1809998.

It is an arithmetic number, because the mean of its divisors is an integer number (843503760).

Almost surely, 2^20797416845 is an apocalyptic number.

It is an amenable number.

20797416845 is a deficient number, since it is larger than the sum of its proper divisors (6194703475).

20797416845 is a wasteful number, since it uses less digits than its factorization.

20797416845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12125.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 20797416845 in words is "twenty billion, seven hundred ninety-seven million, four hundred sixteen thousand, eight hundred forty-five".