21113014393 has 2 divisors, whose sum is σ = 21113014394. Its totient is φ = 21113014392.

The previous prime is 21113014343. The next prime is 21113014421. The reversal of 21113014393 is 39341031112.

It is an a-pointer prime, because the next prime (21113014421) can be obtained adding 21113014393 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19003173904 + 2109840489 = 137852^2 + 45933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113014393 is a prime.

It is not a weakly prime, because it can be changed into another prime (21113014303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556507196 + 10556507197.

It is an arithmetic number, because the mean of its divisors is an integer number (10556507197).

Almost surely, 2^21113014393 is an apocalyptic number.

It is an amenable number.

21113014393 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113014393 is an equidigital number, since it uses as much as digits as its factorization.

21113014393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 21113014393 in words is "twenty-one billion, one hundred thirteen million, fourteen thousand, three hundred ninety-three".