20420585 has 8 divisors (see below), whose sum is σ = 24528960. Its totient is φ = 16320304.

The previous prime is 20420579. The next prime is 20420591. The reversal of 20420585 is 58502402.

It is an interprime number because it is at equal distance from previous prime (20420579) and next prime (20420591).

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 20420585 - 2⁸ = 20420329 is a prime.

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, 8996 + ... + 11034.

It is an arithmetic number, because the mean of its divisors is an integer number (3066120).

Almost surely, 2^20420585 is an apocalyptic number.

It is an amenable number.

20420585 is a deficient number, since it is larger than the sum of its proper divisors (4108375).

20420585 is a wasteful number, since it uses less digits than its factorization.

20420585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4047.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 20420585 is about 4518.9141394809. The cubic root of 20420585 is about 273.3313164965.

Adding to 20420585 its reverse (58502402), we get a palindrome (78922987).

The spelling of 20420585 in words is "twenty million, four hundred twenty thousand, five hundred eighty-five".