20855134 has 8 divisors (see below), whose sum is σ = 31355280. Its totient is φ = 10403376.

The previous prime is 20855123. The next prime is 20855201. The reversal of 20855134 is 43155802.

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

It is a super-2 number, since 2×20855134² = 869873228315912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10999 + ... + 12754.

It is an arithmetic number, because the mean of its divisors is an integer number (3919410).

Almost surely, 2^20855134 is an apocalyptic number.

20855134 is a deficient number, since it is larger than the sum of its proper divisors (10500146).

20855134 is a wasteful number, since it uses less digits than its factorization.

20855134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24194.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 20855134 is about 4566.7421648260. The cubic root of 20855134 is about 275.2565495693.

The spelling of 20855134 in words is "twenty million, eight hundred fifty-five thousand, one hundred thirty-four".