20213346 has 16 divisors (see below), whose sum is σ = 40670784. Its totient is φ = 6697104.

The previous prime is 20213317. The next prime is 20213351. The reversal of 20213346 is 64331202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9085 + ... + 11088.

It is an arithmetic number, because the mean of its divisors is an integer number (2541924).

Almost surely, 2^20213346 is an apocalyptic number.

20213346 is an abundant number, since it is smaller than the sum of its proper divisors (20457438).

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

20213346 is a wasteful number, since it uses less digits than its factorization.

20213346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20345.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20213346 is about 4495.9254887064. The cubic root of 20213346 is about 272.4035334553.

Adding to 20213346 its reverse (64331202), we get a palindrome (84544548).

The spelling of 20213346 in words is "twenty million, two hundred thirteen thousand, three hundred forty-six".