18735434 has 4 divisors (see below), whose sum is σ = 28103154. Its totient is φ = 9367716.

The previous prime is 18735433. The next prime is 18735443. The reversal of 18735434 is 43453781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14100025 + 4635409 = 3755^2 + 2153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18735394 and 18735403.

It is not an unprimeable number, because it can be changed into a prime (18735433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4683857 + ... + 4683860.

Almost surely, 2^18735434 is an apocalyptic number.

18735434 is a deficient number, since it is larger than the sum of its proper divisors (9367720).

18735434 is an equidigital number, since it uses as much as digits as its factorization.

18735434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9367719.

The product of its digits is 40320, while the sum is 35.

The square root of 18735434 is about 4328.4447553365. Note that the first 3 decimals coincide. The cubic root of 18735434 is about 265.5958303193.

The spelling of 18735434 in words is "eighteen million, seven hundred thirty-five thousand, four hundred thirty-four".