20802824 has 16 divisors (see below), whose sum is σ = 44577600. Its totient is φ = 8915472.

The previous prime is 20802823. The next prime is 20802839. The reversal of 20802824 is 42820802.

It is a junction number, because it is equal to n+sod(n) for n = 20802793 and 20802802.

It is not an unprimeable number, because it can be changed into a prime (20802823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185684 + ... + 185795.

It is an arithmetic number, because the mean of its divisors is an integer number (2786100).

Almost surely, 2^20802824 is an apocalyptic number.

It is an amenable number.

20802824 is an abundant number, since it is smaller than the sum of its proper divisors (23774776).

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

20802824 is a wasteful number, since it uses less digits than its factorization.

20802824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371492 (or 371488 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 20802824 is about 4561.0112913695. The cubic root of 20802824 is about 275.0262189878.

The spelling of 20802824 in words is "twenty million, eight hundred two thousand, eight hundred twenty-four".