20155134 has 16 divisors (see below), whose sum is σ = 40360320. Its totient is φ = 6710040.

The previous prime is 20155129. The next prime is 20155147. The reversal of 20155134 is 43155102.

It is a self number, because there is not a number n which added to its sum of digits gives 20155134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5007 + ... + 8085.

It is an arithmetic number, because the mean of its divisors is an integer number (2522520).

Almost surely, 2^20155134 is an apocalyptic number.

20155134 is an abundant number, since it is smaller than the sum of its proper divisors (20205186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20155134 is a wasteful number, since it uses less digits than its factorization.

20155134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 20155134 is about 4489.4469592590. The cubic root of 20155134 is about 272.1417855797.

The spelling of 20155134 in words is "twenty million, one hundred fifty-five thousand, one hundred thirty-four".