20534855 has 8 divisors (see below), whose sum is σ = 26882064. Its totient is φ = 14934400.

The previous prime is 20534849. The next prime is 20534863. The reversal of 20534855 is 55843502.

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

It is not a de Polignac number, because 20534855 - 2¹⁰ = 20533831 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 186626 + ... + 186735.

It is an arithmetic number, because the mean of its divisors is an integer number (3360258).

Almost surely, 2^20534855 is an apocalyptic number.

20534855 is a deficient number, since it is larger than the sum of its proper divisors (6347209).

20534855 is a wasteful number, since it uses less digits than its factorization.

20534855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373377.

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 20534855 is about 4531.5400252011. The cubic root of 20534855 is about 273.8402064359.

The spelling of 20534855 in words is "twenty million, five hundred thirty-four thousand, eight hundred fifty-five".