20613696 has 56 divisors (see below), whose sum is σ = 55132224. Its totient is φ = 6796800.

The previous prime is 20613647. The next prime is 20613731. The reversal of 20613696 is 69631602.

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, 18861 + ... + 19923.

It is an arithmetic number, because the mean of its divisors is an integer number (984504).

Almost surely, 2^20613696 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 20613696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27566112).

20613696 is an abundant number, since it is smaller than the sum of its proper divisors (34518528).

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

20613696 is a wasteful number, since it uses less digits than its factorization.

20613696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 20613696 is about 4540.2308311362. The cubic root of 20613696 is about 274.1902172510.

The spelling of 20613696 in words is "twenty million, six hundred thirteen thousand, six hundred ninety-six".