20802432 has 128 divisors (see below), whose sum is σ = 64627200. Its totient is φ = 5806080.

The previous prime is 20802427. The next prime is 20802437. The reversal of 20802432 is 23420802.

It is an interprime number because it is at equal distance from previous prime (20802427) and next prime (20802437).

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×20802432² = 865482354229248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 20802399 and 20802408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20802437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190794 + ... + 190902.

It is an arithmetic number, because the mean of its divisors is an integer number (504900).

Almost surely, 2^20802432 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 20802432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32313600).

20802432 is an abundant number, since it is smaller than the sum of its proper divisors (43824768).

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

20802432 is a wasteful number, since it uses less digits than its factorization.

20802432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20802432 is about 4560.9683182412. The cubic root of 20802432 is about 275.0244914826.

The spelling of 20802432 in words is "twenty million, eight hundred two thousand, four hundred thirty-two".