21050307877619 has 2 divisors, whose sum is σ = 21050307877620. Its totient is φ = 21050307877618.

The previous prime is 21050307877531. The next prime is 21050307877633. The reversal of 21050307877619 is 91677870305012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21050307877619 - 2²⁴ = 21050291100403 is a prime.

It is a super-2 number, since 2×21050307877619² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21050307877219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10525153938809 + 10525153938810.

It is an arithmetic number, because the mean of its divisors is an integer number (10525153938810).

Almost surely, 2^{21050307877619} is an apocalyptic number.

21050307877619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21050307877619 is an equidigital number, since it uses as much as digits as its factorization.

21050307877619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4445280, while the sum is 56.

The spelling of 21050307877619 in words is "twenty-one trillion, fifty billion, three hundred seven million, eight hundred seventy-seven thousand, six hundred nineteen".