20623180 has 48 divisors (see below), whose sum is σ = 45722880. Its totient is φ = 7798208.

The previous prime is 20623139. The next prime is 20623181. The reversal of 20623180 is 8132602.

20623180 = T₈₀ + T₈₁ + ... + T₄₉₈.

It is not an unprimeable number, because it can be changed into a prime (20623181) 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, 49011 + ... + 49429.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^20623180 is an apocalyptic number.

20623180 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 20623180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22861440).

20623180 is an abundant number, since it is smaller than the sum of its proper divisors (25099700).

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

20623180 is a wasteful number, since it uses less digits than its factorization.

20623180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20623180 is about 4541.2751513204. The cubic root of 20623180 is about 274.2322608406.

Adding to 20623180 its reverse (8132602), we get a palindrome (28755782).

The spelling of 20623180 in words is "twenty million, six hundred twenty-three thousand, one hundred eighty".