21893828713 has 2 divisors, whose sum is σ = 21893828714. Its totient is φ = 21893828712.

The previous prime is 21893828689. The next prime is 21893828717. The reversal of 21893828713 is 31782839812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10952041104 + 10941787609 = 104652^2 + 104603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21893828713 is a prime.

It is not a weakly prime, because it can be changed into another prime (21893828717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10946914356 + 10946914357.

It is an arithmetic number, because the mean of its divisors is an integer number (10946914357).

Almost surely, 2^21893828713 is an apocalyptic number.

It is an amenable number.

21893828713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21893828713 is an equidigital number, since it uses as much as digits as its factorization.

21893828713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The spelling of 21893828713 in words is "twenty-one billion, eight hundred ninety-three million, eight hundred twenty-eight thousand, seven hundred thirteen".