20630190 has 64 divisors (see below), whose sum is σ = 58429440. Its totient is φ = 4561920.

The previous prime is 20630189. The next prime is 20630209. The reversal of 20630190 is 9103602.

It is a super-2 number, since 2×20630190² = 851209478872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4926 + ... + 8094.

It is an arithmetic number, because the mean of its divisors is an integer number (912960).

Almost surely, 2^20630190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29214720).

20630190 is an abundant number, since it is smaller than the sum of its proper divisors (37799250).

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

20630190 is a wasteful number, since it uses less digits than its factorization.

20630190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20630190 is about 4542.0468953986. The cubic root of 20630190 is about 274.2633286387.

Adding to 20630190 its reverse (9103602), we get a palindrome (29733792).

The spelling of 20630190 in words is "twenty million, six hundred thirty thousand, one hundred ninety".