20155411 has 2 divisors, whose sum is σ = 20155412. Its totient is φ = 20155410.

The previous prime is 20155367. The next prime is 20155427. The reversal of 20155411 is 11455102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20155411 - 2⁷ = 20155283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20155441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077705 + 10077706.

It is an arithmetic number, because the mean of its divisors is an integer number (10077706).

Almost surely, 2^20155411 is an apocalyptic number.

20155411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20155411 is an equidigital number, since it uses as much as digits as its factorization.

20155411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 20155411 is about 4489.4778092780. The cubic root of 20155411 is about 272.1430322915.

The spelling of 20155411 in words is "twenty million, one hundred fifty-five thousand, four hundred eleven".