18729545 has 8 divisors (see below), whose sum is σ = 22562496. Its totient is φ = 14925616.

The previous prime is 18729539. The next prime is 18729583. The reversal of 18729545 is 54592781.

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

It is a cyclic number.

It is not a de Polignac number, because 18729545 - 2⁶ = 18729481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5807 + ... + 8436.

It is an arithmetic number, because the mean of its divisors is an integer number (2820312).

Almost surely, 2^18729545 is an apocalyptic number.

It is an amenable number.

18729545 is a deficient number, since it is larger than the sum of its proper divisors (3832951).

18729545 is a wasteful number, since it uses less digits than its factorization.

18729545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14511.

The product of its digits is 100800, while the sum is 41.

The square root of 18729545 is about 4327.7644344396. The cubic root of 18729545 is about 265.5679996723.

The spelling of 18729545 in words is "eighteen million, seven hundred twenty-nine thousand, five hundred forty-five".