21308814711 has 12 divisors (see below), whose sum is σ = 30782868792. Its totient is φ = 14204275056.

The previous prime is 21308814643. The next prime is 21308814727. The reversal of 21308814711 is 11741880312.

It is not a de Polignac number, because 21308814711 - 2³⁰ = 20235072887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21308814511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46176 + ... + 211541.

It is an arithmetic number, because the mean of its divisors is an integer number (2565239066).

Almost surely, 2^21308814711 is an apocalyptic number.

21308814711 is a deficient number, since it is larger than the sum of its proper divisors (9474054081).

21308814711 is a wasteful number, since it uses less digits than its factorization.

21308814711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266910 (or 266907 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 21308814711 in words is "twenty-one billion, three hundred eight million, eight hundred fourteen thousand, seven hundred eleven".