20619485 has 4 divisors (see below), whose sum is σ = 24743388. Its totient is φ = 16495584.

The previous prime is 20619461. The next prime is 20619527. The reversal of 20619485 is 58491602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15792676 + 4826809 = 3974^2 + 2197^2 .

It is a cyclic number.

It is not a de Polignac number, because 20619485 - 2²² = 16425181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2061944 + ... + 2061953.

It is an arithmetic number, because the mean of its divisors is an integer number (6185847).

Almost surely, 2^20619485 is an apocalyptic number.

It is an amenable number.

20619485 is a deficient number, since it is larger than the sum of its proper divisors (4123903).

20619485 is an equidigital number, since it uses as much as digits as its factorization.

20619485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123902.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20619485 is about 4540.8683090352. The cubic root of 20619485 is about 274.2158820421.

It can be divided in two parts, 206 and 19485, that added together give a palindrome (19691).

The spelling of 20619485 in words is "twenty million, six hundred nineteen thousand, four hundred eighty-five".