20210011999 has 2 divisors, whose sum is σ = 20210012000. Its totient is φ = 20210011998.

The previous prime is 20210011981. The next prime is 20210012021. The reversal of 20210011999 is 99911001202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210011999 - 2³³ = 11620077407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210011399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105005999 + 10105006000.

It is an arithmetic number, because the mean of its divisors is an integer number (10105006000).

Almost surely, 2^20210011999 is an apocalyptic number.

20210011999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210011999 is an equidigital number, since it uses as much as digits as its factorization.

20210011999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 20210011999 in words is "twenty billion, two hundred ten million, eleven thousand, nine hundred ninety-nine".