18934434 has 12 divisors (see below), whose sum is σ = 41024646. Its totient is φ = 6311472.

The previous prime is 18934427. The next prime is 18934439. The reversal of 18934434 is 43443981.

It can be written as a sum of positive squares in only one way, i.e., 18896409 + 38025 = 4347^2 + 195^2 .

It is not an unprimeable number, because it can be changed into a prime (18934439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 525939 + ... + 525974.

Almost surely, 2^18934434 is an apocalyptic number.

18934434 is an abundant number, since it is smaller than the sum of its proper divisors (22090212).

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

18934434 is a wasteful number, since it uses less digits than its factorization.

18934434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051921 (or 1051918 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 18934434 is about 4351.3715079271. The cubic root of 18934434 is about 266.5328700332.

The spelling of 18934434 in words is "eighteen million, nine hundred thirty-four thousand, four hundred thirty-four".