20011099966 has 16 divisors (see below), whose sum is σ = 35264316528. Its totient is φ = 8396265600.

The previous prime is 20011099963. The next prime is 20011099981. The reversal of 20011099966 is 66999011002.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34984155 + ... + 34984726.

It is an arithmetic number, because the mean of its divisors is an integer number (2204019783).

Almost surely, 2^20011099966 is an apocalyptic number.

20011099966 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20011099966 is a deficient number, since it is larger than the sum of its proper divisors (15253216562).

20011099966 is a wasteful number, since it uses less digits than its factorization.

20011099966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69968907.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 20011099966 in words is "twenty billion, eleven million, ninety-nine thousand, nine hundred sixty-six".