19820485 has 8 divisors (see below), whose sum is σ = 24604920. Its totient is φ = 15309504.

The previous prime is 19820473. The next prime is 19820497. The reversal of 19820485 is 58402891.

It is an interprime number because it is at equal distance from previous prime (19820473) and next prime (19820497).

It can be written as a sum of positive squares in 4 ways, for example, as 2256004 + 17564481 = 1502^2 + 4191^2 .

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 19820485 - 2¹¹ = 19818437 is a prime.

It is a congruent 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, 68202 + ... + 68491.

It is an arithmetic number, because the mean of its divisors is an integer number (3075615).

Almost surely, 2^19820485 is an apocalyptic number.

It is an amenable number.

19820485 is a deficient number, since it is larger than the sum of its proper divisors (4784435).

19820485 is a wasteful number, since it uses less digits than its factorization.

19820485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136727.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 19820485 is about 4452.0203278961. The cubic root of 19820485 is about 270.6271885107.

The spelling of 19820485 in words is "nineteen million, eight hundred twenty thousand, four hundred eighty-five".