20245760 has 36 divisors (see below), whose sum is σ = 48497988. Its totient is φ = 8097792.

The previous prime is 20245751. The next prime is 20245777. The reversal of 20245760 is 6754202.

It can be written as a sum of positive squares in 2 ways, for example, as 13191424 + 7054336 = 3632^2 + 2656^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6629 + ... + 9188.

Almost surely, 2^20245760 is an apocalyptic number.

20245760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20245760 is an abundant number, since it is smaller than the sum of its proper divisors (28252228).

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

20245760 is an equidigital number, since it uses as much as digits as its factorization.

20245760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15838 (or 15824 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 20245760 is about 4499.5288642257. The cubic root of 20245760 is about 272.5490639147.

Adding to 20245760 its reverse (6754202), we get a palindrome (26999962).

The spelling of 20245760 in words is "twenty million, two hundred forty-five thousand, seven hundred sixty".