20472480 has 192 divisors, whose sum is σ = 82010880. Its totient is φ = 4672512.

The previous prime is 20472467. The next prime is 20472497. The reversal of 20472480 is 8427402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29902 + ... + 30578.

It is an arithmetic number, because the mean of its divisors is an integer number (427140).

Almost surely, 2^20472480 is an apocalyptic number.

20472480 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 20472480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41005440).

20472480 is an abundant number, since it is smaller than the sum of its proper divisors (61538400).

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

20472480 is a wasteful number, since it uses less digits than its factorization.

20472480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20472480 is about 4524.6524728425. The cubic root of 20472480 is about 273.5626603398.

Adding to 20472480 its reverse (8427402), we get a palindrome (28899882).

The spelling of 20472480 in words is "twenty million, four hundred seventy-two thousand, four hundred eighty".