18400532 has 12 divisors (see below), whose sum is σ = 32325216. Its totient is φ = 9164760.

The previous prime is 18400523. The next prime is 18400541. The reversal of 18400532 is 23500481.

It is an interprime number because it is at equal distance from previous prime (18400523) and next prime (18400541).

It is a junction number, because it is equal to n+sod(n) for n = 18400498 and 18400507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7694 + ... + 9797.

It is an arithmetic number, because the mean of its divisors is an integer number (2693768).

Almost surely, 2^18400532 is an apocalyptic number.

It is an amenable number.

18400532 is a deficient number, since it is larger than the sum of its proper divisors (13924684).

18400532 is a wasteful number, since it uses less digits than its factorization.

18400532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17758 (or 17756 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18400532 is about 4289.5841290270. The cubic root of 18400532 is about 264.0037686943.

The spelling of 18400532 in words is "eighteen million, four hundred thousand, five hundred thirty-two".