20142327281 has 2 divisors, whose sum is σ = 20142327282. Its totient is φ = 20142327280.

The previous prime is 20142327263. The next prime is 20142327347. The reversal of 20142327281 is 18272324102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17998637281 + 2143690000 = 134159^2 + 46300^2 .

It is a cyclic number.

It is not a de Polignac number, because 20142327281 - 2⁶ = 20142327217 is a prime.

It is a super-2 number, since 2×20142327281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20142327241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071163640 + 10071163641.

It is an arithmetic number, because the mean of its divisors is an integer number (10071163641).

Almost surely, 2^20142327281 is an apocalyptic number.

It is an amenable number.

20142327281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20142327281 is an equidigital number, since it uses as much as digits as its factorization.

20142327281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

The spelling of 20142327281 in words is "twenty billion, one hundred forty-two million, three hundred twenty-seven thousand, two hundred eighty-one".