18648705 has 16 divisors (see below), whose sum is σ = 29891520. Its totient is φ = 9928128.

The previous prime is 18648697. The next prime is 18648733. The reversal of 18648705 is 50784681.

It is not a de Polignac number, because 18648705 - 2³ = 18648697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15454 + ... + 16616.

It is an arithmetic number, because the mean of its divisors is an integer number (1868220).

Almost surely, 2^18648705 is an apocalyptic number.

18648705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18648705 is a deficient number, since it is larger than the sum of its proper divisors (11242815).

18648705 is a wasteful number, since it uses less digits than its factorization.

18648705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 18648705 is about 4318.4146396565. The cubic root of 18648705 is about 265.1853692940.

The spelling of 18648705 in words is "eighteen million, six hundred forty-eight thousand, seven hundred five".