18501412 has 12 divisors (see below), whose sum is σ = 32821516. Its totient is φ = 9123840.

The previous prime is 18501403. The next prime is 18501433. The reversal of 18501412 is 21410581.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 8916196 = 3096^2 + 2986^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31389 + ... + 31972.

Almost surely, 2^18501412 is an apocalyptic number.

It is an amenable number.

18501412 is a deficient number, since it is larger than the sum of its proper divisors (14320104).

18501412 is a wasteful number, since it uses less digits than its factorization.

18501412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63438 (or 63436 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 18501412 is about 4301.3267720553. The cubic root of 18501412 is about 264.4853521809.

Adding to 18501412 its reverse (21410581), we get a palindrome (39911993).

The spelling of 18501412 in words is "eighteen million, five hundred one thousand, four hundred twelve".