18649045 has 4 divisors (see below), whose sum is σ = 22378860. Its totient is φ = 14919232.

The previous prime is 18649039. The next prime is 18649069. The reversal of 18649045 is 54094681.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54094681 = 59 ⋅916859.

It can be written as a sum of positive squares in 2 ways, for example, as 3602404 + 15046641 = 1898^2 + 3879^2 .

It is a cyclic number.

It is not a de Polignac number, because 18649045 - 2⁹ = 18648533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18648995 and 18649013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1864900 + ... + 1864909.

It is an arithmetic number, because the mean of its divisors is an integer number (5594715).

Almost surely, 2^18649045 is an apocalyptic number.

It is an amenable number.

18649045 is a deficient number, since it is larger than the sum of its proper divisors (3729815).

18649045 is an equidigital number, since it uses as much as digits as its factorization.

18649045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729814.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18649045 is about 4318.4540057757. The cubic root of 18649045 is about 265.1869808890.

The spelling of 18649045 in words is "eighteen million, six hundred forty-nine thousand, forty-five".