18734709 has 12 divisors (see below), whose sum is σ = 29058144. Its totient is φ = 10705464.

The previous prime is 18734707. The next prime is 18734743. The reversal of 18734709 is 90743781.

It is not a de Polignac number, because 18734709 - 2¹ = 18734707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18734701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63577 + ... + 63870.

It is an arithmetic number, because the mean of its divisors is an integer number (2421512).

Almost surely, 2^18734709 is an apocalyptic number.

It is an amenable number.

18734709 is a deficient number, since it is larger than the sum of its proper divisors (10323435).

18734709 is a wasteful number, since it uses less digits than its factorization.

18734709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127464 (or 127457 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 18734709 is about 4328.3610062008. The cubic root of 18734709 is about 265.5924043786.

The spelling of 18734709 in words is "eighteen million, seven hundred thirty-four thousand, seven hundred nine".