20011099967 has 4 divisors (see below), whose sum is σ = 20011918680. Its totient is φ = 20010281256.

The previous prime is 20011099963. The next prime is 20011099981. The reversal of 20011099967 is 76999011002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76999011002 = 2 ⋅38499505501.

It is a cyclic number.

It is not a de Polignac number, because 20011099967 - 2² = 20011099963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011099963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371528 + ... + 421965.

It is an arithmetic number, because the mean of its divisors is an integer number (5002979670).

Almost surely, 2^20011099967 is an apocalyptic number.

20011099967 is a deficient number, since it is larger than the sum of its proper divisors (818713).

20011099967 is an equidigital number, since it uses as much as digits as its factorization.

20011099967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818712.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 20011099967 in words is "twenty billion, eleven million, ninety-nine thousand, nine hundred sixty-seven".