20490611 has 8 divisors (see below), whose sum is σ = 21066864. Its totient is φ = 19918080.

The previous prime is 20490601. The next prime is 20490619. The reversal of 20490611 is 11609402.

It is a happy number.

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 20490611 - 2¹⁰ = 20489587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20490619) 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, 13076 + ... + 14558.

It is an arithmetic number, because the mean of its divisors is an integer number (2633358).

Almost surely, 2^20490611 is an apocalyptic number.

20490611 is a deficient number, since it is larger than the sum of its proper divisors (576253).

20490611 is a wasteful number, since it uses less digits than its factorization.

20490611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20490611 is about 4526.6556087248. The cubic root of 20490611 is about 273.6433947548.

The spelling of 20490611 in words is "twenty million, four hundred ninety thousand, six hundred eleven".