20204214142391 has 2 divisors, whose sum is σ = 20204214142392. Its totient is φ = 20204214142390.

The previous prime is 20204214142201. The next prime is 20204214142561. The reversal of 20204214142391 is 19324141240202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20204214142391 - 2¹⁴ = 20204214126007 is a prime.

It is a super-2 number, since 2×20204214142391² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20204214142991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102107071195 + 10102107071196.

It is an arithmetic number, because the mean of its divisors is an integer number (10102107071196).

Almost surely, 2^{20204214142391} is an apocalyptic number.

20204214142391 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204214142391 is an equidigital number, since it uses as much as digits as its factorization.

20204214142391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 20204214142391 its reverse (19324141240202), we get a palindrome (39528355382593).

The spelling of 20204214142391 in words is "twenty trillion, two hundred four billion, two hundred fourteen million, one hundred forty-two thousand, three hundred ninety-one".