20213494 has 16 divisors (see below), whose sum is σ = 34771968. Its totient is φ = 8632872.

The previous prime is 20213471. The next prime is 20213497. The reversal of 20213494 is 49431202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1947 + ... + 6649.

It is an arithmetic number, because the mean of its divisors is an integer number (2173248).

Almost surely, 2^20213494 is an apocalyptic number.

20213494 is a deficient number, since it is larger than the sum of its proper divisors (14558474).

20213494 is a wasteful number, since it uses less digits than its factorization.

20213494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20213494 is about 4495.9419480238. The cubic root of 20213494 is about 272.4041982903.

Adding to 20213494 its reverse (49431202), we get a palindrome (69644696).

The spelling of 20213494 in words is "twenty million, two hundred thirteen thousand, four hundred ninety-four".