21313898305 has 16 divisors (see below), whose sum is σ = 29233350144. Its totient is φ = 14613814080.

The previous prime is 21313898233. The next prime is 21313898311. The reversal of 21313898305 is 50389831312.

It is not a de Polignac number, because 21313898305 - 2⁹ = 21313897793 is a prime.

It is a Duffinian number.

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, 435000 + ... + 481510.

It is an arithmetic number, because the mean of its divisors is an integer number (1827084384).

Almost surely, 2^21313898305 is an apocalyptic number.

It is an amenable number.

21313898305 is a deficient number, since it is larger than the sum of its proper divisors (7919451839).

21313898305 is a wasteful number, since it uses less digits than its factorization.

21313898305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59616.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 21313898305 in words is "twenty-one billion, three hundred thirteen million, eight hundred ninety-eight thousand, three hundred five".