19742141 has 2 divisors, whose sum is σ = 19742142. Its totient is φ = 19742140.

The previous prime is 19742123. The next prime is 19742143. The reversal of 19742141 is 14124791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11930116 + 7812025 = 3454^2 + 2795^2 .

It is a cyclic number.

It is not a de Polignac number, because 19742141 - 2⁶ = 19742077 is a prime.

Together with 19742143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19742143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9871070 + 9871071.

It is an arithmetic number, because the mean of its divisors is an integer number (9871071).

Almost surely, 2^19742141 is an apocalyptic number.

It is an amenable number.

19742141 is a deficient number, since it is larger than the sum of its proper divisors (1).

19742141 is an equidigital number, since it uses as much as digits as its factorization.

19742141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 19742141 is about 4443.2129140972. The cubic root of 19742141 is about 270.2701502768.

The spelling of 19742141 in words is "nineteen million, seven hundred forty-two thousand, one hundred forty-one".