18746540 has 24 divisors (see below), whose sum is σ = 41440560. Its totient is φ = 7103808.

The previous prime is 18746527. The next prime is 18746549. The reversal of 18746540 is 4564781.

It is a self number, because there is not a number n which added to its sum of digits gives 18746540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18746549) 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, 24287 + ... + 25046.

It is an arithmetic number, because the mean of its divisors is an integer number (1726690).

Almost surely, 2^18746540 is an apocalyptic number.

18746540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18746540 is an abundant number, since it is smaller than the sum of its proper divisors (22694020).

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

18746540 is a wasteful number, since it uses less digits than its factorization.

18746540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49361 (or 49359 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 18746540 is about 4329.7274741027. The cubic root of 18746540 is about 265.6482999630.

The spelling of 18746540 in words is "eighteen million, seven hundred forty-six thousand, five hundred forty".