18473740 has 12 divisors (see below), whose sum is σ = 38794896. Its totient is φ = 7389488.

The previous prime is 18473717. The next prime is 18473743. The reversal of 18473740 is 4737481.

It is a junction number, because it is equal to n+sod(n) for n = 18473696 and 18473705.

It is not an unprimeable number, because it can be changed into a prime (18473743) by changing a digit.

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, 461824 + ... + 461863.

It is an arithmetic number, because the mean of its divisors is an integer number (3232908).

Almost surely, 2^18473740 is an apocalyptic number.

18473740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18473740 is an abundant number, since it is smaller than the sum of its proper divisors (20321156).

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

18473740 is a wasteful number, since it uses less digits than its factorization.

18473740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923696 (or 923694 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 18473740 is about 4298.1088864755. The cubic root of 18473740 is about 264.3534254834.

The spelling of 18473740 in words is "eighteen million, four hundred seventy-three thousand, seven hundred forty".