18897560 has 64 divisors (see below), whose sum is σ = 48016800. Its totient is φ = 6630400.

The previous prime is 18897547. The next prime is 18897563. The reversal of 18897560 is 6579881.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18897563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12020 + ... + 13500.

Almost surely, 2^18897560 is an apocalyptic number.

18897560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18897560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24008400).

18897560 is an abundant number, since it is smaller than the sum of its proper divisors (29119240).

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

18897560 is a wasteful number, since it uses less digits than its factorization.

18897560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1528 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 18897560 is about 4347.1323881382. The cubic root of 18897560 is about 266.3597371418.

It can be divided in two parts, 1889 and 7560, that added together give a palindrome (9449).

The spelling of 18897560 in words is "eighteen million, eight hundred ninety-seven thousand, five hundred sixty".