20411385 has 8 divisors (see below), whose sum is σ = 32658240. Its totient is φ = 10886064.

The previous prime is 20411381. The next prime is 20411387. The reversal of 20411385 is 58311402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20411385 - 2² = 20411381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20411381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680365 + ... + 680394.

It is an arithmetic number, because the mean of its divisors is an integer number (4082280).

Almost surely, 2^20411385 is an apocalyptic number.

It is an amenable number.

20411385 is a deficient number, since it is larger than the sum of its proper divisors (12246855).

20411385 is a wasteful number, since it uses less digits than its factorization.

20411385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360767.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 20411385 is about 4517.8960811422. The cubic root of 20411385 is about 273.2902627290.

Adding to 20411385 its reverse (58311402), we get a palindrome (78722787).

The spelling of 20411385 in words is "twenty million, four hundred eleven thousand, three hundred eighty-five".