20556122 has 8 divisors (see below), whose sum is σ = 31133856. Its totient is φ = 10178172.

The previous prime is 20556121. The next prime is 20556149. The reversal of 20556122 is 22165502.

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

It is not an unprimeable number, because it can be changed into a prime (20556121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49688 + ... + 50099.

It is an arithmetic number, because the mean of its divisors is an integer number (3891732).

Almost surely, 2^20556122 is an apocalyptic number.

20556122 is a deficient number, since it is larger than the sum of its proper divisors (10577734).

20556122 is a wasteful number, since it uses less digits than its factorization.

20556122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99892.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20556122 is about 4533.8859712172. The cubic root of 20556122 is about 273.9347083671.

The spelling of 20556122 in words is "twenty million, five hundred fifty-six thousand, one hundred twenty-two".