20909000266 has 32 divisors (see below), whose sum is σ = 39147084288. Its totient is φ = 8137085040.

The previous prime is 20909000257. The next prime is 20909000291. The reversal of 20909000266 is 66200090902.

It is a pancake number, because a pancake can be divided into 20909000266 parts by 204494 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59101 + ... + 212863.

It is an arithmetic number, because the mean of its divisors is an integer number (1223346384).

Almost surely, 2^20909000266 is an apocalyptic number.

20909000266 is a deficient number, since it is larger than the sum of its proper divisors (18238084022).

20909000266 is a wasteful number, since it uses less digits than its factorization.

20909000266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154666.

The product of its (nonzero) digits is 11664, while the sum is 34.

The spelling of 20909000266 in words is "twenty billion, nine hundred nine million, two hundred sixty-six", and thus it is an aban number.