20245560 has 32 divisors (see below), whose sum is σ = 60737040. Its totient is φ = 5398784.

The previous prime is 20245559. The next prime is 20245571. The reversal of 20245560 is 6554202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20245560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84237 + ... + 84476.

Almost surely, 2^20245560 is an apocalyptic number.

20245560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20245560 is an abundant number, since it is smaller than the sum of its proper divisors (40491480).

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

20245560 is a wasteful number, since it uses less digits than its factorization.

20245560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168727 (or 168723 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20245560 is about 4499.5066396217. The cubic root of 20245560 is about 272.5481664429.

Adding to 20245560 its reverse (6554202), we get a palindrome (26799762).

The spelling of 20245560 in words is "twenty million, two hundred forty-five thousand, five hundred sixty".