20449395011 has 2 divisors, whose sum is σ = 20449395012. Its totient is φ = 20449395010.

The previous prime is 20449394947. The next prime is 20449395019. The reversal of 20449395011 is 11059394402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20449395011 - 2⁶ = 20449394947 is a prime.

It is a super-3 number, since 3×20449395011³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20449395019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224697505 + 10224697506.

It is an arithmetic number, because the mean of its divisors is an integer number (10224697506).

Almost surely, 2^20449395011 is an apocalyptic number.

20449395011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20449395011 is an equidigital number, since it uses as much as digits as its factorization.

20449395011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 20449395011 in words is "twenty billion, four hundred forty-nine million, three hundred ninety-five thousand, eleven".