18400514 has 8 divisors (see below), whose sum is σ = 30109968. Its totient is φ = 8363860.

The previous prime is 18400489. The next prime is 18400523. The reversal of 18400514 is 41500481.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18400514.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418172 + ... + 418215.

It is an arithmetic number, because the mean of its divisors is an integer number (3763746).

Almost surely, 2^18400514 is an apocalyptic number.

18400514 is a deficient number, since it is larger than the sum of its proper divisors (11709454).

18400514 is a wasteful number, since it uses less digits than its factorization.

18400514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836400.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 18400514 is about 4289.5820309210. The cubic root of 18400514 is about 264.0036826086.

Adding to 18400514 its reverse (41500481), we get a palindrome (59900995).

The spelling of 18400514 in words is "eighteen million, four hundred thousand, five hundred fourteen".