18646036 has 24 divisors (see below), whose sum is σ = 33471144. Its totient is φ = 9085440.

The previous prime is 18646027. The next prime is 18646073. The reversal of 18646036 is 63064681.

It can be written as a sum of positive squares in 4 ways, for example, as 1089936 + 17556100 = 1044^2 + 4190^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18645992 and 18646010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59416 + ... + 59728.

It is an arithmetic number, because the mean of its divisors is an integer number (1394631).

Almost surely, 2^18646036 is an apocalyptic number.

It is an amenable number.

18646036 is a deficient number, since it is larger than the sum of its proper divisors (14825108).

18646036 is a wasteful number, since it uses less digits than its factorization.

18646036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 18646036 is about 4318.1056031552. The cubic root of 18646036 is about 265.1727175930.

The spelling of 18646036 in words is "eighteen million, six hundred forty-six thousand, thirty-six".