20555873670309 has 8 divisors (see below), whose sum is σ = 28850349011040. Its totient is φ = 12982657054896.

The previous prime is 20555873670281. The next prime is 20555873670313. The reversal of 20555873670309 is 90307637855502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20555873670309 - 2⁷ = 20555873670181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555873670329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180314681262 + ... + 180314681375.

It is an arithmetic number, because the mean of its divisors is an integer number (3606293626380).

Almost surely, 2^{20555873670309} is an apocalyptic number.

It is an amenable number.

20555873670309 is a deficient number, since it is larger than the sum of its proper divisors (8294475340731).

20555873670309 is a wasteful number, since it uses less digits than its factorization.

20555873670309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360629362659.

The product of its (nonzero) digits is 47628000, while the sum is 60.

The spelling of 20555873670309 in words is "twenty trillion, five hundred fifty-five billion, eight hundred seventy-three million, six hundred seventy thousand, three hundred nine".