18550069 has 4 divisors (see below), whose sum is σ = 18784960. Its totient is φ = 18315180.

The previous prime is 18550067. The next prime is 18550079. The reversal of 18550069 is 96005581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18550069 - 2¹ = 18550067 is a prime.

It is a super-2 number, since 2×18550069² = 688210119809522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18550067) 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, 117327 + ... + 117484.

It is an arithmetic number, because the mean of its divisors is an integer number (4696240).

Almost surely, 2^18550069 is an apocalyptic number.

It is an amenable number.

18550069 is a deficient number, since it is larger than the sum of its proper divisors (234891).

18550069 is an equidigital number, since it uses as much as digits as its factorization.

18550069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234890.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 18550069 is about 4306.9791037338. The cubic root of 18550069 is about 264.7170065497.

The spelling of 18550069 in words is "eighteen million, five hundred fifty thousand, sixty-nine".