20110399999 has 2 divisors, whose sum is σ = 20110400000. Its totient is φ = 20110399998.

The previous prime is 20110399993. The next prime is 20110400021. The reversal of 20110399999 is 99999301102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110399999 - 2¹⁹ = 20109875711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110399993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055199999 + 10055200000.

It is an arithmetic number, because the mean of its divisors is an integer number (10055200000).

Almost surely, 2^20110399999 is an apocalyptic number.

20110399999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110399999 is an equidigital number, since it uses as much as digits as its factorization.

20110399999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 354294, while the sum is 52.

The spelling of 20110399999 in words is "twenty billion, one hundred ten million, three hundred ninety-nine thousand, nine hundred ninety-nine".