20049505 has 8 divisors (see below), whose sum is σ = 27496512. Its totient is φ = 13748208.

The previous prime is 20049493. The next prime is 20049509. The reversal of 20049505 is 50594002.

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 20049505 - 2⁵ = 20049473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20049505.

It is not an unprimeable number, because it can be changed into a prime (20049509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286387 + ... + 286456.

It is an arithmetic number, because the mean of its divisors is an integer number (3437064).

Almost surely, 2^20049505 is an apocalyptic number.

It is an amenable number.

20049505 is a deficient number, since it is larger than the sum of its proper divisors (7447007).

20049505 is an equidigital number, since it uses as much as digits as its factorization.

20049505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572855.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 20049505 is about 4477.6673614729. The cubic root of 20049505 is about 271.6655391993.

The spelling of 20049505 in words is "twenty million, forty-nine thousand, five hundred five".