18709514 has 4 divisors (see below), whose sum is σ = 28064274. Its totient is φ = 9354756.

The previous prime is 18709499. The next prime is 18709517. The reversal of 18709514 is 41590781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41590781 = 661 ⋅62921.

It can be written as a sum of positive squares in only one way, i.e., 13935289 + 4774225 = 3733^2 + 2185^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18709517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4677377 + ... + 4677380.

Almost surely, 2^18709514 is an apocalyptic number.

18709514 is a deficient number, since it is larger than the sum of its proper divisors (9354760).

18709514 is an equidigital number, since it uses as much as digits as its factorization.

18709514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9354759.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18709514 is about 4325.4495720098. The cubic root of 18709514 is about 265.4732920835.

The spelling of 18709514 in words is "eighteen million, seven hundred nine thousand, five hundred fourteen".