18920469 has 8 divisors (see below), whose sum is σ = 25287552. Its totient is φ = 12583520.

The previous prime is 18920459. The next prime is 18920477. The reversal of 18920469 is 96402981.

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 18920469 - 2⁴ = 18920453 is a prime.

It is a super-2 number, since 2×18920469² = 715968294359922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18920449) 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, 6024 + ... + 8609.

It is an arithmetic number, because the mean of its divisors is an integer number (3160944).

Almost surely, 2^18920469 is an apocalyptic number.

It is an amenable number.

18920469 is a deficient number, since it is larger than the sum of its proper divisors (6367083).

18920469 is a wasteful number, since it uses less digits than its factorization.

18920469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15067.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 18920469 is about 4349.7665454597. The cubic root of 18920469 is about 266.4673272416.

The spelling of 18920469 in words is "eighteen million, nine hundred twenty thousand, four hundred sixty-nine".