20620120161665 has 8 divisors (see below), whose sum is σ = 24779953379328. Its totient is φ = 16472223339120.

The previous prime is 20620120161649. The next prime is 20620120161691. The reversal of 20620120161665 is 56616102102602.

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

It is not a de Polignac number, because 20620120161665 - 2⁴ = 20620120161649 is a prime.

It is a Duffinian 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, 2984094977 + ... + 2984101886.

It is an arithmetic number, because the mean of its divisors is an integer number (3097494172416).

Almost surely, 2^{20620120161665} is an apocalyptic number.

It is an amenable number.

20620120161665 is a deficient number, since it is larger than the sum of its proper divisors (4159833217663).

20620120161665 is an equidigital number, since it uses as much as digits as its factorization.

20620120161665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968197559.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 20620120161665 in words is "twenty trillion, six hundred twenty billion, one hundred twenty million, one hundred sixty-one thousand, six hundred sixty-five".