20555534 has 8 divisors (see below), whose sum is σ = 30894048. Its totient is φ = 10257520.

The previous prime is 20555527. The next prime is 20555551. The reversal of 20555534 is 43555502.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20555497 and 20555506.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8822 + ... + 10905.

It is an arithmetic number, because the mean of its divisors is an integer number (3861756).

Almost surely, 2^20555534 is an apocalyptic number.

20555534 is a deficient number, since it is larger than the sum of its proper divisors (10338514).

20555534 is a wasteful number, since it uses less digits than its factorization.

20555534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20250.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 20555534 is about 4533.8211257172. The cubic root of 20555534 is about 273.9320964097.

The spelling of 20555534 in words is "twenty million, five hundred fifty-five thousand, five hundred thirty-four".