18434961 has 6 divisors (see below), whose sum is σ = 26628290. Its totient is φ = 12289968.

The previous prime is 18434957. The next prime is 18434989. The reversal of 18434961 is 16943481.

It can be written as a sum of positive squares in only one way, i.e., 12383361 + 6051600 = 3519^2 + 2460^2 .

It is not a de Polignac number, because 18434961 - 2² = 18434957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18434561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1024156 + ... + 1024173.

Almost surely, 2^18434961 is an apocalyptic number.

It is an amenable number.

18434961 is a deficient number, since it is larger than the sum of its proper divisors (8193329).

18434961 is a wasteful number, since it uses less digits than its factorization.

18434961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048335 (or 2048332 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 18434961 is about 4293.5953465598. The cubic root of 18434961 is about 264.1683241290.

The spelling of 18434961 in words is "eighteen million, four hundred thirty-four thousand, nine hundred sixty-one".