20404134419927 has 2 divisors, whose sum is σ = 20404134419928. Its totient is φ = 20404134419926.

The previous prime is 20404134419923. The next prime is 20404134419983. The reversal of 20404134419927 is 72991443140402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20404134419927 - 2² = 20404134419923 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20404134419923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10202067209963 + 10202067209964.

It is an arithmetic number, because the mean of its divisors is an integer number (10202067209964).

Almost surely, 2^{20404134419927} is an apocalyptic number.

20404134419927 is a deficient number, since it is larger than the sum of its proper divisors (1).

20404134419927 is an equidigital number, since it uses as much as digits as its factorization.

20404134419927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 20404134419927 in words is "twenty trillion, four hundred four billion, one hundred thirty-four million, four hundred nineteen thousand, nine hundred twenty-seven".