18502049 has 4 divisors (see below), whose sum is σ = 18510660. Its totient is φ = 18493440.

The previous prime is 18502039. The next prime is 18502061. The reversal of 18502049 is 94020581.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12475024 + 6027025 = 3532^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 18502049 - 2⁸ = 18501793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18502019) 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, 1889 + ... + 6369.

It is an arithmetic number, because the mean of its divisors is an integer number (4627665).

Almost surely, 2^18502049 is an apocalyptic number.

It is an amenable number.

18502049 is a deficient number, since it is larger than the sum of its proper divisors (8611).

18502049 is an equidigital number, since it uses as much as digits as its factorization.

18502049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8610.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18502049 is about 4301.4008183381. The cubic root of 18502049 is about 264.4883875391.

The spelling of 18502049 in words is "eighteen million, five hundred two thousand, forty-nine".