20996304 has 120 divisors (see below), whose sum is σ = 64460160. Its totient is φ = 5870592.

The previous prime is 20996303. The next prime is 20996359. The reversal of 20996304 is 40369902.

It is a super-3 number, since 3×20996304³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20996303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185752 + ... + 185864.

It is an arithmetic number, because the mean of its divisors is an integer number (537168).

Almost surely, 2^20996304 is an apocalyptic number.

20996304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20996304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32230080).

20996304 is an abundant number, since it is smaller than the sum of its proper divisors (43463856).

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

20996304 is a wasteful number, since it uses less digits than its factorization.

20996304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 204 counting only the distinct ones).

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

The square root of 20996304 is about 4582.1724105494. The cubic root of 20996304 is about 275.8762310000.

The spelling of 20996304 in words is "twenty million, nine hundred ninety-six thousand, three hundred four".