18521342 has 8 divisors (see below), whose sum is σ = 31750896. Its totient is φ = 7937712.

The previous prime is 18521329. The next prime is 18521407. The reversal of 18521342 is 24312581.

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

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, 661463 + ... + 661490.

It is an arithmetic number, because the mean of its divisors is an integer number (3968862).

Almost surely, 2^18521342 is an apocalyptic number.

18521342 is a deficient number, since it is larger than the sum of its proper divisors (13229554).

18521342 is a wasteful number, since it uses less digits than its factorization.

18521342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322962.

The product of its digits is 1920, while the sum is 26.

The square root of 18521342 is about 4303.6428755184. The cubic root of 18521342 is about 264.5802873038.

The spelling of 18521342 in words is "eighteen million, five hundred twenty-one thousand, three hundred forty-two".