20671055 has 8 divisors (see below), whose sum is σ = 25660800. Its totient is φ = 15966496.

The previous prime is 20671033. The next prime is 20671073. The reversal of 20671055 is 55017602.

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 20671055 - 2¹² = 20666959 is a prime.

It is a congruent 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, 71135 + ... + 71424.

It is an arithmetic number, because the mean of its divisors is an integer number (3207600).

Almost surely, 2^20671055 is an apocalyptic number.

20671055 is a deficient number, since it is larger than the sum of its proper divisors (4989745).

20671055 is a wasteful number, since it uses less digits than its factorization.

20671055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142593.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 20671055 is about 4546.5431923605. The cubic root of 20671055 is about 274.4442993231. Note that the first 3 decimals are identical.

Adding to 20671055 its reverse (55017602), we get a palindrome (75688657).

The spelling of 20671055 in words is "twenty million, six hundred seventy-one thousand, fifty-five".