20816352 has 72 divisors (see below), whose sum is σ = 61411896. Its totient is φ = 6936192.

The previous prime is 20816309. The next prime is 20816359. The reversal of 20816352 is 25361802.

20816352 is a `hidden beast` number, since 20 + 8 + 1 + 635 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20816359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6438 + ... + 9114.

It is an arithmetic number, because the mean of its divisors is an integer number (852943).

Almost surely, 2^20816352 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 20816352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30705948).

20816352 is an abundant number, since it is smaller than the sum of its proper divisors (40595544).

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

20816352 is an equidigital number, since it uses as much as digits as its factorization.

20816352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20816352 is about 4562.4940547906. The cubic root of 20816352 is about 275.0858222495.

The spelling of 20816352 in words is "twenty million, eight hundred sixteen thousand, three hundred fifty-two".