20411057 has 2 divisors, whose sum is σ = 20411058. Its totient is φ = 20411056.

The previous prime is 20411029. The next prime is 20411089. The reversal of 20411057 is 75011402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 1366561 = 4364^2 + 1169^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411057 - 2⁸ = 20410801 is a prime.

It is a super-2 number, since 2×20411057² = 833222495714498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20411357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205528 + 10205529.

It is an arithmetic number, because the mean of its divisors is an integer number (10205529).

Almost surely, 2^20411057 is an apocalyptic number.

It is an amenable number.

20411057 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411057 is an equidigital number, since it uses as much as digits as its factorization.

20411057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 20411057 is about 4517.8597809140. The cubic root of 20411057 is about 273.2887988452.

Adding to 20411057 its reverse (75011402), we get a palindrome (95422459).

The spelling of 20411057 in words is "twenty million, four hundred eleven thousand, fifty-seven".