20213190 has 24 divisors (see below), whose sum is σ = 52554528. Its totient is φ = 5390160.

The previous prime is 20213183. The next prime is 20213197. The reversal of 20213190 is 9131202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20213183) and next prime (20213197).

It is a super-2 number, since 2×20213190² = 817146099952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213197) 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 11 ways as a sum of consecutive naturals, for example, 112206 + ... + 112385.

It is an arithmetic number, because the mean of its divisors is an integer number (2189772).

Almost surely, 2^20213190 is an apocalyptic number.

20213190 is an abundant number, since it is smaller than the sum of its proper divisors (32341338).

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

20213190 is a wasteful number, since it uses less digits than its factorization.

20213190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224604 (or 224601 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20213190 is about 4495.9081396310. The cubic root of 20213190 is about 272.4028326796.

Adding to 20213190 its reverse (9131202), we get a palindrome (29344392).

The spelling of 20213190 in words is "twenty million, two hundred thirteen thousand, one hundred ninety".