20555835 has 8 divisors (see below), whose sum is σ = 32889360. Its totient is φ = 10963104.

The previous prime is 20555827. The next prime is 20555897. The reversal of 20555835 is 53855502.

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

It is not a de Polignac number, because 20555835 - 2³ = 20555827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20555796 and 20555805.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 685180 + ... + 685209.

It is an arithmetic number, because the mean of its divisors is an integer number (4111170).

Almost surely, 2^20555835 is an apocalyptic number.

20555835 is a deficient number, since it is larger than the sum of its proper divisors (12333525).

20555835 is a wasteful number, since it uses less digits than its factorization.

20555835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370397.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 20555835 is about 4533.8543205533. The cubic root of 20555835 is about 273.9334334893.

The spelling of 20555835 in words is "twenty million, five hundred fifty-five thousand, eight hundred thirty-five".