20155110 has 16 divisors (see below), whose sum is σ = 48372336. Its totient is φ = 5374688.

The previous prime is 20155097. The next prime is 20155117. The reversal of 20155110 is 1155102.

It is a super-2 number, since 2×20155110² = 812456918224200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20155110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155117) by changing a digit.

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, 335889 + ... + 335948.

It is an arithmetic number, because the mean of its divisors is an integer number (3023271).

Almost surely, 2^20155110 is an apocalyptic number.

20155110 is an abundant number, since it is smaller than the sum of its proper divisors (28217226).

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

20155110 is a wasteful number, since it uses less digits than its factorization.

20155110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671847.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 20155110 is about 4489.4442863232. Note that the first 3 decimals coincide. The cubic root of 20155110 is about 272.1416775608.

The spelling of 20155110 in words is "twenty million, one hundred fifty-five thousand, one hundred ten".