18660460 has 48 divisors (see below), whose sum is σ = 48234816. Its totient is φ = 5905152.

The previous prime is 18660437. The next prime is 18660463. The reversal of 18660460 is 6406681.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18660463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3307 + ... + 6946.

It is an arithmetic number, because the mean of its divisors is an integer number (1004892).

Almost surely, 2^18660460 is an apocalyptic number.

18660460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18660460 is an abundant number, since it is smaller than the sum of its proper divisors (29574356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18660460 is a wasteful number, since it uses less digits than its factorization.

18660460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10282 (or 10280 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18660460 is about 4319.7754571274. The cubic root of 18660460 is about 265.2410764556.

The spelling of 18660460 in words is "eighteen million, six hundred sixty thousand, four hundred sixty".