20127678371 has 2 divisors, whose sum is σ = 20127678372. Its totient is φ = 20127678370.

The previous prime is 20127678331. The next prime is 20127678421. The reversal of 20127678371 is 17387672102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20127678371 - 2²² = 20123484067 is a prime.

It is not a weakly prime, because it can be changed into another prime (20127678331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10063839185 + 10063839186.

It is an arithmetic number, because the mean of its divisors is an integer number (10063839186).

Almost surely, 2^20127678371 is an apocalyptic number.

20127678371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20127678371 is an equidigital number, since it uses as much as digits as its factorization.

20127678371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 20127678371 in words is "twenty billion, one hundred twenty-seven million, six hundred seventy-eight thousand, three hundred seventy-one".