20165620067 has 4 divisors (see below), whose sum is σ = 20167760976. Its totient is φ = 20163479160.

The previous prime is 20165620051. The next prime is 20165620121. The reversal of 20165620067 is 76002656102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20165620067 - 2⁴ = 20165620051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20165620567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056263 + ... + 1075184.

It is an arithmetic number, because the mean of its divisors is an integer number (5041940244).

Almost surely, 2^20165620067 is an apocalyptic number.

20165620067 is a deficient number, since it is larger than the sum of its proper divisors (2140909).

20165620067 is an equidigital number, since it uses as much as digits as its factorization.

20165620067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140908.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 20165620067 in words is "twenty billion, one hundred sixty-five million, six hundred twenty thousand, sixty-seven".