18454434 has 16 divisors (see below), whose sum is σ = 38851680. Its totient is φ = 5827680.

The previous prime is 18454427. The next prime is 18454451. The reversal of 18454434 is 43445481.

It is a super-2 number, since 2×18454434² = 681132268520712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18454395 and 18454404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80827 + ... + 81054.

It is an arithmetic number, because the mean of its divisors is an integer number (2428230).

Almost surely, 2^18454434 is an apocalyptic number.

18454434 is an abundant number, since it is smaller than the sum of its proper divisors (20397246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18454434 is a wasteful number, since it uses less digits than its factorization.

18454434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161905.

The product of its digits is 30720, while the sum is 33.

The square root of 18454434 is about 4295.8624279648. The cubic root of 18454434 is about 264.2613057843.

The spelling of 18454434 in words is "eighteen million, four hundred fifty-four thousand, four hundred thirty-four".