18431061 has 16 divisors (see below), whose sum is σ = 26946048. Its totient is φ = 11113200.

The previous prime is 18431059. The next prime is 18431131. The reversal of 18431061 is 16013481.

It is not a de Polignac number, because 18431061 - 2¹ = 18431059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18431011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5640 + ... + 8286.

It is an arithmetic number, because the mean of its divisors is an integer number (1684128).

Almost surely, 2^18431061 is an apocalyptic number.

18431061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18431061 is a deficient number, since it is larger than the sum of its proper divisors (8514987).

18431061 is a wasteful number, since it uses less digits than its factorization.

18431061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 18431061 is about 4293.1411577073. The cubic root of 18431061 is about 264.1496941443.

The spelling of 18431061 in words is "eighteen million, four hundred thirty-one thousand, sixty-one".