20175090 has 96 divisors (see below), whose sum is σ = 55702080. Its totient is φ = 4647936.

The previous prime is 20175061. The next prime is 20175121. The reversal of 20175090 is 9057102.

It is a self number, because there is not a number n which added to its sum of digits gives 20175090.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112621 + ... + 112799.

It is an arithmetic number, because the mean of its divisors is an integer number (580230).

Almost surely, 2^20175090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20175090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27851040).

20175090 is an abundant number, since it is smaller than the sum of its proper divisors (35526990).

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

20175090 is a wasteful number, since it uses less digits than its factorization.

20175090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 20175090 is about 4491.6689548541. The cubic root of 20175090 is about 272.2315736217.

The spelling of 20175090 in words is "twenty million, one hundred seventy-five thousand, ninety".