21007282027 has 2 divisors, whose sum is σ = 21007282028. Its totient is φ = 21007282026.

The previous prime is 21007281979. The next prime is 21007282031. The reversal of 21007282027 is 72028270012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21007282027 - 2¹⁵ = 21007249259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21007282027.

It is not a weakly prime, because it can be changed into another prime (21007252027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10503641013 + 10503641014.

It is an arithmetic number, because the mean of its divisors is an integer number (10503641014).

Almost surely, 2^21007282027 is an apocalyptic number.

21007282027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21007282027 is an equidigital number, since it uses as much as digits as its factorization.

21007282027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 31.

The spelling of 21007282027 in words is "twenty-one billion, seven million, two hundred eighty-two thousand, twenty-seven".