21170457283 has 2 divisors, whose sum is σ = 21170457284. Its totient is φ = 21170457282.

The previous prime is 21170457271. The next prime is 21170457307. The reversal of 21170457283 is 38275407112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21170457283 - 2⁵ = 21170457251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21170457233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10585228641 + 10585228642.

It is an arithmetic number, because the mean of its divisors is an integer number (10585228642).

Almost surely, 2^21170457283 is an apocalyptic number.

21170457283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21170457283 is an equidigital number, since it uses as much as digits as its factorization.

21170457283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 21170457283 in words is "twenty-one billion, one hundred seventy million, four hundred fifty-seven thousand, two hundred eighty-three".