18534740 has 36 divisors (see below), whose sum is σ = 45280116. Its totient is φ = 6354432.

The previous prime is 18534727. The next prime is 18534749. The reversal of 18534740 is 4743581.

It can be written as a sum of positive squares in 2 ways, for example, as 13454224 + 5080516 = 3668^2 + 2254^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18534697 and 18534706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18534749) 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 11 ways as a sum of consecutive naturals, for example, 8477 + ... + 10436.

It is an arithmetic number, because the mean of its divisors is an integer number (1257781).

Almost surely, 2^18534740 is an apocalyptic number.

18534740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18534740 is an abundant number, since it is smaller than the sum of its proper divisors (26745376).

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

18534740 is a wasteful number, since it uses less digits than its factorization.

18534740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18936 (or 18927 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 18534740 is about 4305.1991823840. The cubic root of 18534740 is about 264.6440694400.

The spelling of 18534740 in words is "eighteen million, five hundred thirty-four thousand, seven hundred forty".