20021099992919 has 2 divisors, whose sum is σ = 20021099992920. Its totient is φ = 20021099992918.

The previous prime is 20021099992871. The next prime is 20021099992921. The reversal of 20021099992919 is 91929999012002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20021099992919 - 2¹⁶ = 20021099927383 is a prime.

It is a super-2 number, since 2×20021099992919² (a number of 27 digits) contains 22 as substring.

Together with 20021099992921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021099992939) 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, 10010549996459 + 10010549996460.

It is an arithmetic number, because the mean of its divisors is an integer number (10010549996460).

Almost surely, 2^{20021099992919} is an apocalyptic number.

20021099992919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021099992919 is an equidigital number, since it uses as much as digits as its factorization.

20021099992919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The spelling of 20021099992919 in words is "twenty trillion, twenty-one billion, ninety-nine million, nine hundred ninety-two thousand, nine hundred nineteen".