18849520 has 40 divisors (see below), whose sum is σ = 46135440. Its totient is φ = 7142400.

The previous prime is 18849511. The next prime is 18849527. The reversal of 18849520 is 2594881.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 18849520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4681 + ... + 7720.

It is an arithmetic number, because the mean of its divisors is an integer number (1153386).

Almost surely, 2^18849520 is an apocalyptic number.

18849520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18849520 is an abundant number, since it is smaller than the sum of its proper divisors (27285920).

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

18849520 is a wasteful number, since it uses less digits than its factorization.

18849520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12433 (or 12427 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 18849520 is about 4341.6033904538. The cubic root of 18849520 is about 266.1338388413.

The spelling of 18849520 in words is "eighteen million, eight hundred forty-nine thousand, five hundred twenty".