19995560 has 32 divisors (see below), whose sum is σ = 48452040. Its totient is φ = 7382784.

The previous prime is 19995551. The next prime is 19995583. The reversal of 19995560 is 6559991.

It can be written as a sum of positive squares in 4 ways, for example, as 12716356 + 7279204 = 3566^2 + 2698^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18707 + ... + 19746.

Almost surely, 2^19995560 is an apocalyptic number.

19995560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19995560 is an abundant number, since it is smaller than the sum of its proper divisors (28456480).

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

19995560 is a wasteful number, since it uses less digits than its factorization.

19995560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38477 (or 38473 counting only the distinct ones).

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 19995560 is about 4471.6395203549. The cubic root of 19995560 is about 271.4216734825.

It can be divided in two parts, 199 and 95560, that added together give a palindrome (95759).

The spelling of 19995560 in words is "nineteen million, nine hundred ninety-five thousand, five hundred sixty".