20790190 has 8 divisors (see below), whose sum is σ = 37422360. Its totient is φ = 8316072.

The previous prime is 20790173. The next prime is 20790191. The reversal of 20790190 is 9109702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20790190² = 864464000472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20790191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1039500 + ... + 1039519.

It is an arithmetic number, because the mean of its divisors is an integer number (4677795).

Almost surely, 2^20790190 is an apocalyptic number.

20790190 is a deficient number, since it is larger than the sum of its proper divisors (16632170).

20790190 is a wasteful number, since it uses less digits than its factorization.

20790190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079026.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 20790190 is about 4559.6260811606. The cubic root of 20790190 is about 274.9705312775.

Adding to 20790190 its reverse (9109702), we get a palindrome (29899892).

The spelling of 20790190 in words is "twenty million, seven hundred ninety thousand, one hundred ninety".