20624080 has 40 divisors (see below), whose sum is σ = 48639744. Its totient is φ = 8131200.

The previous prime is 20624069. The next prime is 20624113. The reversal of 20624080 is 8042602.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865 + ... + 7495.

Almost surely, 2^20624080 is an apocalyptic number.

20624080 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 20624080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24319872).

20624080 is an abundant number, since it is smaller than the sum of its proper divisors (28015664).

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

20624080 is a wasteful number, since it uses less digits than its factorization.

20624080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715 (or 3709 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20624080 is about 4541.3742413503. The cubic root of 20624080 is about 274.2362499674.

Adding to 20624080 its reverse (8042602), we get a palindrome (28666682).

It can be divided in two parts, 20 and 624080, that added together give a square (624100 = 790²).

The spelling of 20624080 in words is "twenty million, six hundred twenty-four thousand, eighty".