18530938406 has 8 divisors (see below), whose sum is σ = 27821295840. Its totient is φ = 9257173128.

The previous prime is 18530938397. The next prime is 18530938409. The reversal of 18530938406 is 60483903581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18530938409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4145246 + ... + 4149713.

It is an arithmetic number, because the mean of its divisors is an integer number (3477661980).

Almost surely, 2^18530938406 is an apocalyptic number.

18530938406 is a deficient number, since it is larger than the sum of its proper divisors (9290357434).

18530938406 is a wasteful number, since it uses less digits than its factorization.

18530938406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8296078.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 18530938406 in words is "eighteen billion, five hundred thirty million, nine hundred thirty-eight thousand, four hundred six".