18534416 has 10 divisors (see below), whose sum is σ = 35910462. Its totient is φ = 9267200.

The previous prime is 18534413. The next prime is 18534421. The reversal of 18534416 is 61443581.

It can be written as a sum of positive squares in only one way, i.e., 18524416 + 10000 = 4304^2 + 100^2 .

It is a super-2 number, since 2×18534416² = 687049152922112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18534413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579185 + ... + 579216.

Almost surely, 2^18534416 is an apocalyptic number.

18534416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18534416 is a deficient number, since it is larger than the sum of its proper divisors (17376046).

18534416 is a wasteful number, since it uses less digits than its factorization.

18534416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158409 (or 1158403 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 18534416 is about 4305.1615532986. The cubic root of 18534416 is about 264.6425273776.

Adding to 18534416 its reverse (61443581), we get a palindrome (79977997).

The spelling of 18534416 in words is "eighteen million, five hundred thirty-four thousand, four hundred sixteen".