18869829 has 24 divisors (see below), whose sum is σ = 27898080. Its totient is φ = 11336160.

The previous prime is 18869797. The next prime is 18869833. The reversal of 18869829 is 92896881.

It is not a de Polignac number, because 18869829 - 2⁵ = 18869797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18869839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82287 + ... + 82515.

It is an arithmetic number, because the mean of its divisors is an integer number (1162420).

Almost surely, 2^18869829 is an apocalyptic number.

It is an amenable number.

18869829 is a deficient number, since it is larger than the sum of its proper divisors (9028251).

18869829 is a wasteful number, since it uses less digits than its factorization.

18869829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481 (or 470 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The square root of 18869829 is about 4343.9416432544. The cubic root of 18869829 is about 266.2293845485.

The spelling of 18869829 in words is "eighteen million, eight hundred sixty-nine thousand, eight hundred twenty-nine".