27934064021 has 2 divisors, whose sum is σ = 27934064022. Its totient is φ = 27934064020.

The previous prime is 27934063987. The next prime is 27934064101. The reversal of 27934064021 is 12046043972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15748995025 + 12185068996 = 125495^2 + 110386^2 .

It is a cyclic number.

It is not a de Polignac number, because 27934064021 - 2⁶ = 27934063957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27934064621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13967032010 + 13967032011.

It is an arithmetic number, because the mean of its divisors is an integer number (13967032011).

Almost surely, 2^27934064021 is an apocalyptic number.

It is an amenable number.

27934064021 is a deficient number, since it is larger than the sum of its proper divisors (1).

27934064021 is an equidigital number, since it uses as much as digits as its factorization.

27934064021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 27934064021 in words is "twenty-seven billion, nine hundred thirty-four million, sixty-four thousand, twenty-one".