18689654 has 8 divisors (see below), whose sum is σ = 29510040. Its totient is φ = 8852976.

The previous prime is 18689653. The next prime is 18689689. The reversal of 18689654 is 45698681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18689599 and 18689608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18689653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245879 + ... + 245954.

It is an arithmetic number, because the mean of its divisors is an integer number (3688755).

Almost surely, 2^18689654 is an apocalyptic number.

18689654 is a deficient number, since it is larger than the sum of its proper divisors (10820386).

18689654 is a wasteful number, since it uses less digits than its factorization.

18689654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491854.

The product of its digits is 414720, while the sum is 47.

The square root of 18689654 is about 4323.1532473416. The cubic root of 18689654 is about 265.3793262331.

The spelling of 18689654 in words is "eighteen million, six hundred eighty-nine thousand, six hundred fifty-four".