18759013 has 20 divisors (see below), whose sum is σ = 23606828. Its totient is φ = 14817600.

The previous prime is 18758977. The next prime is 18759019. The reversal of 18759013 is 31095781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9229444 + 9529569 = 3038^2 + 3087^2 .

It is not a de Polignac number, because 18759013 - 2¹⁷ = 18627941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18759013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18759019) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30913 + ... + 31513.

Almost surely, 2^18759013 is an apocalyptic number.

18759013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18759013 is a deficient number, since it is larger than the sum of its proper divisors (4847815).

18759013 is an frugal number, since it uses more digits than its factorization.

18759013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 18759013 is about 4331.1676254793. The cubic root of 18759013 is about 265.7072032176.

The spelling of 18759013 in words is "eighteen million, seven hundred fifty-nine thousand, thirteen".