20410021019 has 2 divisors, whose sum is σ = 20410021020. Its totient is φ = 20410021018.

The previous prime is 20410021013. The next prime is 20410021123. The reversal of 20410021019 is 91012001402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20410021019 is a prime.

It is a super-2 number, since 2×20410021019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20410021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205010509 + 10205010510.

It is an arithmetic number, because the mean of its divisors is an integer number (10205010510).

Almost surely, 2^20410021019 is an apocalyptic number.

20410021019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20410021019 is an equidigital number, since it uses as much as digits as its factorization.

20410021019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20410021019 in words is "twenty billion, four hundred ten million, twenty-one thousand, nineteen".