18366741 has 6 divisors (see below), whose sum is σ = 26529750. Its totient is φ = 12244488.

The previous prime is 18366739. The next prime is 18366743. The reversal of 18366741 is 14766381.

It is an interprime number because it is at equal distance from previous prime (18366739) and next prime (18366743).

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 4639716 = 3705^2 + 2154^2 .

It is not a de Polignac number, because 18366741 - 2¹ = 18366739 is a prime.

It is a super-2 number, since 2×18366741² = 674674349922162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18366696 and 18366705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366743) 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, 1020366 + ... + 1020383.

It is an arithmetic number, because the mean of its divisors is an integer number (4421625).

Almost surely, 2^18366741 is an apocalyptic number.

It is an amenable number.

18366741 is a deficient number, since it is larger than the sum of its proper divisors (8163009).

18366741 is a wasteful number, since it uses less digits than its factorization.

18366741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040755 (or 2040752 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 18366741 is about 4285.6435922741. The cubic root of 18366741 is about 263.8420629027.

The spelling of 18366741 in words is "eighteen million, three hundred sixty-six thousand, seven hundred forty-one".