20826480 has 80 divisors (see below), whose sum is σ = 65245824. Its totient is φ = 5495040.

The previous prime is 20826473. The next prime is 20826493. The reversal of 20826480 is 8462802.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25275 + ... + 26085.

Almost surely, 2^20826480 is an apocalyptic number.

20826480 is a gapful number since it is divisible by the number (20) 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 20826480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32622912).

20826480 is an abundant number, since it is smaller than the sum of its proper divisors (44419344).

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

20826480 is a wasteful number, since it uses less digits than its factorization.

20826480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 20826480 is about 4563.6038390728. The cubic root of 20826480 is about 275.1304284880.

The spelling of 20826480 in words is "twenty million, eight hundred twenty-six thousand, four hundred eighty".