21384795862093 has 4 divisors (see below), whose sum is σ = 21384909846748. Its totient is φ = 21384681877440.

The previous prime is 21384795862063. The next prime is 21384795862099. The reversal of 21384795862093 is 39026859748312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3778564485609 + 17606231376484 = 1943853^2 + 4195978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21384795862093 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 (21384795862099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56710446 + ... + 57086287.

It is an arithmetic number, because the mean of its divisors is an integer number (5346227461687).

It is a 1-persistent number, because it is pandigital, but 2⋅21384795862093 = 42769591724186 is not.

Almost surely, 2^{21384795862093} is an apocalyptic number.

It is an amenable number.

21384795862093 is a deficient number, since it is larger than the sum of its proper divisors (113984655).

21384795862093 is a wasteful number, since it uses less digits than its factorization.

21384795862093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113984654.

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 21384795862093 in words is "twenty-one trillion, three hundred eighty-four billion, seven hundred ninety-five million, eight hundred sixty-two thousand, ninety-three".