19970404127 has 2 divisors, whose sum is σ = 19970404128. Its totient is φ = 19970404126.

The previous prime is 19970404039. The next prime is 19970404163. The reversal of 19970404127 is 72140407991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19970404127 - 2²⁰ = 19969355551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19970404177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9985202063 + 9985202064.

It is an arithmetic number, because the mean of its divisors is an integer number (9985202064).

Almost surely, 2^19970404127 is an apocalyptic number.

19970404127 is a deficient number, since it is larger than the sum of its proper divisors (1).

19970404127 is an equidigital number, since it uses as much as digits as its factorization.

19970404127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 19970404127 in words is "nineteen billion, nine hundred seventy million, four hundred four thousand, one hundred twenty-seven".