18435812 has 6 divisors (see below), whose sum is σ = 32262678. Its totient is φ = 9217904.

The previous prime is 18435799. The next prime is 18435817. The reversal of 18435812 is 21853481.

It can be written as a sum of positive squares in only one way, i.e., 15952036 + 2483776 = 3994^2 + 1576^2 .

It is not an unprimeable number, because it can be changed into a prime (18435817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304473 + ... + 2304480.

It is an arithmetic number, because the mean of its divisors is an integer number (5377113).

Almost surely, 2^18435812 is an apocalyptic number.

It is an amenable number.

18435812 is a deficient number, since it is larger than the sum of its proper divisors (13826866).

18435812 is a wasteful number, since it uses less digits than its factorization.

18435812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608957 (or 4608955 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 18435812 is about 4293.6944465111. The cubic root of 18435812 is about 264.1723889380.

The spelling of 18435812 in words is "eighteen million, four hundred thirty-five thousand, eight hundred twelve".