18280532 has 6 divisors (see below), whose sum is σ = 31990938. Its totient is φ = 9140264.

The previous prime is 18280531. The next prime is 18280567. The reversal of 18280532 is 23508281.

It can be written as a sum of positive squares in only one way, i.e., 18267076 + 13456 = 4274^2 + 116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18280495 and 18280504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280531) 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 as a sum of consecutive naturals, namely, 2285063 + ... + 2285070.

It is an arithmetic number, because the mean of its divisors is an integer number (5331823).

Almost surely, 2^18280532 is an apocalyptic number.

It is an amenable number.

18280532 is a deficient number, since it is larger than the sum of its proper divisors (13710406).

18280532 is a wasteful number, since it uses less digits than its factorization.

18280532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570137 (or 4570135 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 18280532 is about 4275.5738796096. The cubic root of 18280532 is about 263.4286119288.

The spelling of 18280532 in words is "eighteen million, two hundred eighty thousand, five hundred thirty-two".