20790635173 has 48 divisors (see below), whose sum is σ = 27100681920. Its totient is φ = 15765792000.

The previous prime is 20790635171. The next prime is 20790635179. The reversal of 20790635173 is 37153609702.

It is a happy number.

It is not a de Polignac number, because 20790635173 - 2¹ = 20790635171 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 (20790635171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3208665 + ... + 3215137.

It is an arithmetic number, because the mean of its divisors is an integer number (564597540).

Almost surely, 2^20790635173 is an apocalyptic number.

It is an amenable number.

20790635173 is a deficient number, since it is larger than the sum of its proper divisors (6310046747).

20790635173 is a wasteful number, since it uses less digits than its factorization.

20790635173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6658 (or 6651 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 43.

The spelling of 20790635173 in words is "twenty billion, seven hundred ninety million, six hundred thirty-five thousand, one hundred seventy-three".