20556127 has 8 divisors (see below), whose sum is σ = 21277872. Its totient is φ = 19843200.

The previous prime is 20556121. The next prime is 20556149. The reversal of 20556127 is 72165502.

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 20556127 - 2⁷ = 20555999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20556095 and 20556104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20556121) 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, 2727 + ... + 6967.

It is an arithmetic number, because the mean of its divisors is an integer number (2659734).

Almost surely, 2^20556127 is an apocalyptic number.

20556127 is a deficient number, since it is larger than the sum of its proper divisors (721745).

20556127 is a wasteful number, since it uses less digits than its factorization.

20556127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 20556127 is about 4533.8865226205. The cubic root of 20556127 is about 273.9347305774.

Multiplying 20556127 by its sum of digits (28), we get a triangular number (575571556 = T₃₃₉₂₈).

The spelling of 20556127 in words is "twenty million, five hundred fifty-six thousand, one hundred twenty-seven".