18820069 has 8 divisors (see below), whose sum is σ = 19842048. Its totient is φ = 17824080.

The previous prime is 18820063. The next prime is 18820073. The reversal of 18820069 is 96002881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18820069 - 2²³ = 10431461 is a prime.

It is a super-2 number, since 2×18820069² = 708389994329522, 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 (18820063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5002 + ... + 7915.

It is an arithmetic number, because the mean of its divisors is an integer number (2480256).

Almost surely, 2^18820069 is an apocalyptic number.

It is an amenable number.

18820069 is a deficient number, since it is larger than the sum of its proper divisors (1021979).

18820069 is a wasteful number, since it uses less digits than its factorization.

18820069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12995.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18820069 is about 4338.2103452922. The cubic root of 18820069 is about 265.9951616886.

The spelling of 18820069 in words is "eighteen million, eight hundred twenty thousand, sixty-nine".