18790521 has 8 divisors (see below), whose sum is σ = 25918080. Its totient is φ = 12094992.

The previous prime is 18790511. The next prime is 18790523. The reversal of 18790521 is 12509781.

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

It is not a de Polignac number, because 18790521 - 2¹⁹ = 18266233 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18790523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107905 + ... + 108078.

It is an arithmetic number, because the mean of its divisors is an integer number (3239760).

Almost surely, 2^18790521 is an apocalyptic number.

It is an amenable number.

18790521 is a deficient number, since it is larger than the sum of its proper divisors (7127559).

18790521 is a wasteful number, since it uses less digits than its factorization.

18790521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216015.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 18790521 is about 4334.8034557521. The cubic root of 18790521 is about 265.8558823214.

The spelling of 18790521 in words is "eighteen million, seven hundred ninety thousand, five hundred twenty-one".