20826057 has 8 divisors (see below), whose sum is σ = 31734976. Its totient is φ = 11900592.

The previous prime is 20826053. The next prime is 20826077. The reversal of 20826057 is 75062802.

20826057 is nontrivially palindromic in base 8.

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

It is not a de Polignac number, because 20826057 - 2² = 20826053 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20826053) 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, 495838 + ... + 495879.

It is an arithmetic number, because the mean of its divisors is an integer number (3966872).

Almost surely, 2^20826057 is an apocalyptic number.

It is an amenable number.

20826057 is a deficient number, since it is larger than the sum of its proper divisors (10908919).

20826057 is an equidigital number, since it uses as much as digits as its factorization.

20826057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991727.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 20826057 is about 4563.5574938857. The cubic root of 20826057 is about 275.1285657799.

Adding to 20826057 its reverse (75062802), we get a palindrome (95888859).

The spelling of 20826057 in words is "twenty million, eight hundred twenty-six thousand, fifty-seven".