20042560 has 28 divisors (see below), whose sum is σ = 47727108. Its totient is φ = 8016896.

The previous prime is 20042557. The next prime is 20042573. The reversal of 20042560 is 6524002.

It can be written as a sum of positive squares in 2 ways, for example, as 5419584 + 14622976 = 2328^2 + 3824^2 .

It is a super-2 number, since 2×20042560² = 803408422707200, which contains 22 as substring.

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, 30997 + ... + 31636.

Almost surely, 2^20042560 is an apocalyptic number.

20042560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20042560 is an abundant number, since it is smaller than the sum of its proper divisors (27684548).

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

20042560 is an equidigital number, since it uses as much as digits as its factorization.

20042560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62650 (or 62640 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20042560 is about 4476.8917789020. The cubic root of 20042560 is about 271.6341679334.

Adding to 20042560 its reverse (6524002), we get a palindrome (26566562).

It can be divided in two parts, 20042 and 560, that added together give a palindrome (20602).

The spelling of 20042560 in words is "twenty million, forty-two thousand, five hundred sixty".