20655105667 has 8 divisors (see below), whose sum is σ = 24419829600. Its totient is φ = 17093880384.

The previous prime is 20655105641. The next prime is 20655105673. The reversal of 20655105667 is 76650155602.

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

It is not a de Polignac number, because 20655105667 - 2⁷ = 20655105539 is a prime.

It is a super-2 number, since 2×20655105667² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20655105467) 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, 50874442 + ... + 50874847.

It is an arithmetic number, because the mean of its divisors is an integer number (3052478700).

Almost surely, 2^20655105667 is an apocalyptic number.

20655105667 is a deficient number, since it is larger than the sum of its proper divisors (3764723933).

20655105667 is a wasteful number, since it uses less digits than its factorization.

20655105667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101749325.

The product of its (nonzero) digits is 378000, while the sum is 43.

The spelling of 20655105667 in words is "twenty billion, six hundred fifty-five million, one hundred five thousand, six hundred sixty-seven".