20269121905 has 8 divisors (see below), whose sum is σ = 24389223552. Its totient is φ = 16171112688.

The previous prime is 20269121881. The next prime is 20269121909. The reversal of 20269121905 is 50912196202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20269121905 - 2¹⁹ = 20268597617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20269121909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5521087 + ... + 5524756.

It is an arithmetic number, because the mean of its divisors is an integer number (3048652944).

Almost surely, 2^20269121905 is an apocalyptic number.

It is an amenable number.

20269121905 is a deficient number, since it is larger than the sum of its proper divisors (4120101647).

20269121905 is a wasteful number, since it uses less digits than its factorization.

20269121905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11046215.

The product of its (nonzero) digits is 19440, while the sum is 37.

The spelling of 20269121905 in words is "twenty billion, two hundred sixty-nine million, one hundred twenty-one thousand, nine hundred five".