20213396 has 48 divisors (see below), whose sum is σ = 42134400. Its totient is φ = 8304768.

The previous prime is 20213353. The next prime is 20213399. The reversal of 20213396 is 69331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112835 + ... + 113013.

It is an arithmetic number, because the mean of its divisors is an integer number (877800).

Almost surely, 2^20213396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20213396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21067200).

20213396 is an abundant number, since it is smaller than the sum of its proper divisors (21921004).

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

20213396 is a wasteful number, since it uses less digits than its factorization.

20213396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 20213396 is about 4495.9310492933. The cubic root of 20213396 is about 272.4037580621.

Adding to 20213396 its reverse (69331202), we get a palindrome (89544598).

The spelling of 20213396 in words is "twenty million, two hundred thirteen thousand, three hundred ninety-six".