18610049 has 4 divisors (see below), whose sum is σ = 18961236. Its totient is φ = 18258864.

The previous prime is 18610027. The next prime is 18610051. The reversal of 18610049 is 94001681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94001681 = 7283 ⋅12907.

It can be written as a sum of positive squares in 2 ways, for example, as 5793649 + 12816400 = 2407^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 18610049 - 2¹² = 18605953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18610069) 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, 175514 + ... + 175619.

It is an arithmetic number, because the mean of its divisors is an integer number (4740309).

Almost surely, 2^18610049 is an apocalyptic number.

It is an amenable number.

18610049 is a deficient number, since it is larger than the sum of its proper divisors (351187).

18610049 is an equidigital number, since it uses as much as digits as its factorization.

18610049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351186.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 18610049 is about 4313.9366012959. The cubic root of 18610049 is about 265.0020125633.

The spelling of 18610049 in words is "eighteen million, six hundred ten thousand, forty-nine".