18542069 has 16 divisors (see below), whose sum is σ = 23442048. Its totient is φ = 14271552.

The previous prime is 18542063. The next prime is 18542093. The reversal of 18542069 is 96024581.

It is a cyclic number.

It is not a de Polignac number, because 18542069 - 2¹⁶ = 18476533 is a prime.

It is a super-2 number, since 2×18542069² = 687616645601522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18542063) 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, 614 + ... + 6120.

It is an arithmetic number, because the mean of its divisors is an integer number (1465128).

Almost surely, 2^18542069 is an apocalyptic number.

It is an amenable number.

18542069 is a deficient number, since it is larger than the sum of its proper divisors (4899979).

18542069 is a wasteful number, since it uses less digits than its factorization.

18542069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 18542069 is about 4306.0502783874. The cubic root of 18542069 is about 264.6789466632.

The spelling of 18542069 in words is "eighteen million, five hundred forty-two thousand, sixty-nine".