21296493371 has 2 divisors, whose sum is σ = 21296493372. Its totient is φ = 21296493370.

The previous prime is 21296493299. The next prime is 21296493373. The reversal of 21296493371 is 17339469212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21296493371 - 2¹⁴ = 21296476987 is a prime.

It is a Sophie Germain prime.

Together with 21296493373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21296493373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10648246685 + 10648246686.

It is an arithmetic number, because the mean of its divisors is an integer number (10648246686).

Almost surely, 2^21296493371 is an apocalyptic number.

21296493371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21296493371 is an equidigital number, since it uses as much as digits as its factorization.

21296493371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The spelling of 21296493371 in words is "twenty-one billion, two hundred ninety-six million, four hundred ninety-three thousand, three hundred seventy-one".