18429854 has 16 divisors (see below), whose sum is σ = 28939680. Its totient is φ = 8785920.

The previous prime is 18429839. The next prime is 18429857. The reversal of 18429854 is 45892481.

18429854 = 2145² + 2146² + ... + 2148².

It is a super-2 number, since 2×18429854² = 679319036922632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18429857) 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, 23582 + ... + 24350.

It is an arithmetic number, because the mean of its divisors is an integer number (1808730).

Almost surely, 2^18429854 is an apocalyptic number.

18429854 is a deficient number, since it is larger than the sum of its proper divisors (10509826).

18429854 is a wasteful number, since it uses less digits than its factorization.

18429854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its digits is 92160, while the sum is 41.

The square root of 18429854 is about 4293.0005823433. Note that the first 3 decimals coincide. The cubic root of 18429854 is about 264.1439278703.

The spelling of 18429854 in words is "eighteen million, four hundred twenty-nine thousand, eight hundred fifty-four".