20120576 has 66 divisors (see below), whose sum is σ = 46904958. Its totient is φ = 8601600.

The previous prime is 20120543. The next prime is 20120623. The reversal of 20120576 is 67502102.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 50176 = 4480^2 + 224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49976 + ... + 50376.

Almost surely, 2^20120576 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 20120576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23452479).

20120576 is an abundant number, since it is smaller than the sum of its proper divisors (26784382).

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

20120576 is an equidigital number, since it uses as much as digits as its factorization.

20120576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20120576 is about 4485.5965043682. The cubic root of 20120576 is about 271.9861584652.

Adding to 20120576 its reverse (67502102), we get a palindrome (87622678).

The spelling of 20120576 in words is "twenty million, one hundred twenty thousand, five hundred seventy-six".