20916911941 has 4 divisors (see below), whose sum is σ = 20933216352. Its totient is φ = 20900607532.

The previous prime is 20916911909. The next prime is 20916911947. The reversal of 20916911941 is 14911961902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20916911941 - 2⁵ = 20916911909 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 (20916911947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8150281 + ... + 8152846.

It is an arithmetic number, because the mean of its divisors is an integer number (5233304088).

Almost surely, 2^20916911941 is an apocalyptic number.

It is an amenable number.

20916911941 is a deficient number, since it is larger than the sum of its proper divisors (16304411).

20916911941 is a wasteful number, since it uses less digits than its factorization.

20916911941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16304410.

The product of its (nonzero) digits is 34992, while the sum is 43.

The spelling of 20916911941 in words is "twenty billion, nine hundred sixteen million, nine hundred eleven thousand, nine hundred forty-one".