21000311093 has 16 divisors (see below), whose sum is σ = 21536296320. Its totient is φ = 20471463936.

The previous prime is 21000311083. The next prime is 21000311107. The reversal of 21000311093 is 39011300012.

It is a cyclic number.

It is not a de Polignac number, because 21000311093 - 2⁴ = 21000311077 is a prime.

It is a super-3 number, since 3×21000311093³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000311083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5820296 + ... + 5823902.

It is an arithmetic number, because the mean of its divisors is an integer number (1346018520).

Almost surely, 2^21000311093 is an apocalyptic number.

It is an amenable number.

21000311093 is a deficient number, since it is larger than the sum of its proper divisors (535985227).

21000311093 is a wasteful number, since it uses less digits than its factorization.

21000311093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556.

The product of its (nonzero) digits is 162, while the sum is 20.

The spelling of 21000311093 in words is "twenty-one billion, three hundred eleven thousand, ninety-three".