20670055 has 8 divisors (see below), whose sum is σ = 28347552. Its totient is φ = 14173728.

The previous prime is 20670047. The next prime is 20670059. The reversal of 20670055 is 55007602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20670055 - 2³ = 20670047 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 (20670059) 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, 295252 + ... + 295321.

It is an arithmetic number, because the mean of its divisors is an integer number (3543444).

Almost surely, 2^20670055 is an apocalyptic number.

20670055 is a deficient number, since it is larger than the sum of its proper divisors (7677497).

20670055 is an equidigital number, since it uses as much as digits as its factorization.

20670055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590585.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20670055 is about 4546.4332173694. The cubic root of 20670055 is about 274.4398736705.

Adding to 20670055 its reverse (55007602), we get a palindrome (75677657).

The spelling of 20670055 in words is "twenty million, six hundred seventy thousand, fifty-five".