18499741 has 8 divisors (see below), whose sum is σ = 20461784. Its totient is φ = 16614720.

The previous prime is 18499739. The next prime is 18499769. The reversal of 18499741 is 14799481.

It can be written as a sum of positive squares in 4 ways, for example, as 1102500 + 17397241 = 1050^2 + 4171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18499741 - 2¹ = 18499739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18499771) 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 7 ways as a sum of consecutive naturals, for example, 18750 + ... + 19711.

It is an arithmetic number, because the mean of its divisors is an integer number (2557723).

Almost surely, 2^18499741 is an apocalyptic number.

It is an amenable number.

18499741 is a deficient number, since it is larger than the sum of its proper divisors (1962043).

18499741 is a wasteful number, since it uses less digits than its factorization.

18499741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38511.

The product of its digits is 72576, while the sum is 43.

The square root of 18499741 is about 4301.1325252775. The cubic root of 18499741 is about 264.4773893954.

The spelling of 18499741 in words is "eighteen million, four hundred ninety-nine thousand, seven hundred forty-one".