20545411 has 2 divisors, whose sum is σ = 20545412. Its totient is φ = 20545410.

The previous prime is 20545409. The next prime is 20545423. The reversal of 20545411 is 11454502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20545411 - 2¹ = 20545409 is a prime.

It is a super-2 number, since 2×20545411² = 844227826317842, which contains 22 as substring.

Together with 20545409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20545711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10272705 + 10272706.

It is an arithmetic number, because the mean of its divisors is an integer number (10272706).

Almost surely, 2^20545411 is an apocalyptic number.

20545411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20545411 is an equidigital number, since it uses as much as digits as its factorization.

20545411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 20545411 is about 4532.7046010081. The cubic root of 20545411 is about 273.8871211742.

Adding to 20545411 its reverse (11454502), we get a palindrome (31999913).

Subtracting from 20545411 its reverse (11454502), we obtain a palindrome (9090909).

It can be divided in two parts, 20545 and 411, that multiplied together give a triangular number (8443995 = T₄₁₀₉).

The spelling of 20545411 in words is "twenty million, five hundred forty-five thousand, four hundred eleven".