21526907027 has 2 divisors, whose sum is σ = 21526907028. Its totient is φ = 21526907026.

The previous prime is 21526906979. The next prime is 21526907117. The reversal of 21526907027 is 72070962512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21526907027 - 2⁶ = 21526906963 is a prime.

It is a super-2 number, since 2×21526907027² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21526907327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10763453513 + 10763453514.

It is an arithmetic number, because the mean of its divisors is an integer number (10763453514).

Almost surely, 2^21526907027 is an apocalyptic number.

21526907027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21526907027 is an equidigital number, since it uses as much as digits as its factorization.

21526907027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 21526907027 in words is "twenty-one billion, five hundred twenty-six million, nine hundred seven thousand, twenty-seven".