20142427 has 2 divisors, whose sum is σ = 20142428. Its totient is φ = 20142426.

The previous prime is 20142401. The next prime is 20142481. The reversal of 20142427 is 72424102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20142427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20142398 and 20142407.

It is not a weakly prime, because it can be changed into another prime (20143427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071213 + 10071214.

It is an arithmetic number, because the mean of its divisors is an integer number (10071214).

Almost surely, 2^20142427 is an apocalyptic number.

20142427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20142427 is an equidigital number, since it uses as much as digits as its factorization.

20142427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 20142427 is about 4488.0315284098. The cubic root of 20142427 is about 272.0845820791.

Adding to 20142427 its reverse (72424102), we get a palindrome (92566529).

The spelling of 20142427 in words is "twenty million, one hundred forty-two thousand, four hundred twenty-seven".