20142797 has 2 divisors, whose sum is σ = 20142798. Its totient is φ = 20142796.

The previous prime is 20142769. The next prime is 20142799. The reversal of 20142797 is 79724102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10588516 + 9554281 = 3254^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 20142797 - 2¹⁴ = 20126413 is a prime.

Together with 20142799, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20142799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071398 + 10071399.

It is an arithmetic number, because the mean of its divisors is an integer number (10071399).

Almost surely, 2^20142797 is an apocalyptic number.

It is an amenable number.

20142797 is a deficient number, since it is larger than the sum of its proper divisors (1).

20142797 is an equidigital number, since it uses as much as digits as its factorization.

20142797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 20142797 is about 4488.0727489647. The cubic root of 20142797 is about 272.0862480597.

Adding to 20142797 its reverse (79724102), we get a palindrome (99866899).

The spelling of 20142797 in words is "twenty million, one hundred forty-two thousand, seven hundred ninety-seven".