21073008637427 has 2 divisors, whose sum is σ = 21073008637428. Its totient is φ = 21073008637426.

The previous prime is 21073008637403. The next prime is 21073008637433. The reversal of 21073008637427 is 72473680037012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21073008637427 - 2²² = 21073004443123 is a prime.

It is not a weakly prime, because it can be changed into another prime (21073008637027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10536504318713 + 10536504318714.

It is an arithmetic number, because the mean of its divisors is an integer number (10536504318714).

Almost surely, 2^{21073008637427} is an apocalyptic number.

21073008637427 is a deficient number, since it is larger than the sum of its proper divisors (1).

21073008637427 is an equidigital number, since it uses as much as digits as its factorization.

21073008637427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 21073008637427 in words is "twenty-one trillion, seventy-three billion, eight million, six hundred thirty-seven thousand, four hundred twenty-seven".