20168190 has 80 divisors (see below), whose sum is σ = 61994592. Its totient is φ = 4608576.

The previous prime is 20168173. The next prime is 20168191. The reversal of 20168190 is 9186102.

It is a super-2 number, since 2×20168190² = 813511775752200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20168191) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3892 + ... + 7448.

Almost surely, 2^20168190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20168190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30997296).

20168190 is an abundant number, since it is smaller than the sum of its proper divisors (41826402).

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

20168190 is a wasteful number, since it uses less digits than its factorization.

20168190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3583 (or 3574 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20168190 is about 4490.9008005076. The cubic root of 20168190 is about 272.2005351474.

The spelling of 20168190 in words is "twenty million, one hundred sixty-eight thousand, one hundred ninety".