18542049 has 16 divisors (see below), whose sum is σ = 25965120. Its totient is φ = 11753280.

The previous prime is 18542039. The next prime is 18542059. The reversal of 18542049 is 94024581.

It is an interprime number because it is at equal distance from previous prime (18542039) and next prime (18542059).

It is not a de Polignac number, because 18542049 - 2²⁰ = 17493473 is a prime.

It is a super-2 number, since 2×18542049² = 687615162236802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18542009) 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, 4239 + ... + 7419.

It is an arithmetic number, because the mean of its divisors is an integer number (1622820).

Almost surely, 2^18542049 is an apocalyptic number.

It is an amenable number.

18542049 is a deficient number, since it is larger than the sum of its proper divisors (7423071).

18542049 is a wasteful number, since it uses less digits than its factorization.

18542049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18542049 is about 4306.0479560729. The cubic root of 18542049 is about 264.6788514998.

The spelling of 18542049 in words is "eighteen million, five hundred forty-two thousand, forty-nine".