20827057 has 8 divisors (see below), whose sum is σ = 22590792. Its totient is φ = 19123200.

The previous prime is 20827049. The next prime is 20827061. The reversal of 20827057 is 75072802.

It can be written as a sum of positive squares in 4 ways, for example, as 24336 + 20802721 = 156^2 + 4561^2 .

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 20827057 - 2³ = 20827049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20827067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14244 + ... + 15637.

It is an arithmetic number, because the mean of its divisors is an integer number (2823849).

Almost surely, 2^20827057 is an apocalyptic number.

It is an amenable number.

20827057 is a deficient number, since it is larger than the sum of its proper divisors (1763735).

20827057 is a wasteful number, since it uses less digits than its factorization.

20827057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29939.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 20827057 is about 4563.6670562170. The cubic root of 20827057 is about 275.1329693045.

Adding to 20827057 its reverse (75072802), we get a palindrome (95899859).

The spelling of 20827057 in words is "twenty million, eight hundred twenty-seven thousand, fifty-seven".