18996653 has 16 divisors (see below), whose sum is σ = 21697200. Its totient is φ = 16504320.

The previous prime is 18996647. The next prime is 18996671. The reversal of 18996653 is 35669981.

It can be written as a sum of positive squares in 8 ways, for example, as 316969 + 18679684 = 563^2 + 4322^2 .

It is a cyclic number.

It is not a de Polignac number, because 18996653 - 2⁶ = 18996589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18996598 and 18996607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18996613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14843 + ... + 16071.

It is an arithmetic number, because the mean of its divisors is an integer number (1356075).

Almost surely, 2^18996653 is an apocalyptic number.

18996653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18996653 is a deficient number, since it is larger than the sum of its proper divisors (2700547).

18996653 is a wasteful number, since it uses less digits than its factorization.

18996653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its digits is 349920, while the sum is 47.

The square root of 18996653 is about 4358.5149994006. The cubic root of 18996653 is about 266.8244952848.

The spelling of 18996653 in words is "eighteen million, nine hundred ninety-six thousand, six hundred fifty-three".