20613296 has 40 divisors (see below), whose sum is σ = 43885584. Its totient is φ = 9301760.

The previous prime is 20613269. The next prime is 20613301. The reversal of 20613296 is 69231602.

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, 30110 + ... + 30786.

Almost surely, 2^20613296 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 20613296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21942792).

20613296 is an abundant number, since it is smaller than the sum of its proper divisors (23272288).

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

20613296 is a wasteful number, since it uses less digits than its factorization.

20613296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20613296 is about 4540.1867802988. The cubic root of 20613296 is about 274.1884437247.

Adding to 20613296 its reverse (69231602), we get a palindrome (89844898).

It can be divided in two parts, 20 and 613296, that added together give a palindrome (613316).

The spelling of 20613296 in words is "twenty million, six hundred thirteen thousand, two hundred ninety-six".