19920505 has 8 divisors (see below), whose sum is σ = 26077824. Its totient is φ = 14487600.

The previous prime is 19920499. The next prime is 19920521. The reversal of 19920505 is 50502991.

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

It is not a de Polignac number, because 19920505 - 2⁵ = 19920473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181041 + ... + 181150.

It is an arithmetic number, because the mean of its divisors is an integer number (3259728).

Almost surely, 2^19920505 is an apocalyptic number.

It is an amenable number.

19920505 is a deficient number, since it is larger than the sum of its proper divisors (6157319).

19920505 is a wasteful number, since it uses less digits than its factorization.

19920505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362207.

The product of its (nonzero) digits is 4050, while the sum is 31.

The square root of 19920505 is about 4463.2392945035. The cubic root of 19920505 is about 271.0816464005.

The spelling of 19920505 in words is "nineteen million, nine hundred twenty thousand, five hundred five".