19740023 has 2 divisors, whose sum is σ = 19740024. Its totient is φ = 19740022.

The previous prime is 19740013. The next prime is 19740067. The reversal of 19740023 is 32004791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19740023 - 2⁶ = 19739959 is a prime.

It is equal to p_1255067 and since 19740023 and 1255067 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 19739974 and 19740001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19740013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870011 + 9870012.

It is an arithmetic number, because the mean of its divisors is an integer number (9870012).

Almost surely, 2^19740023 is an apocalyptic number.

19740023 is a deficient number, since it is larger than the sum of its proper divisors (1).

19740023 is an equidigital number, since it uses as much as digits as its factorization.

19740023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 19740023 is about 4442.9745666614. The cubic root of 19740023 is about 270.2604847826.

The spelling of 19740023 in words is "nineteen million, seven hundred forty thousand, twenty-three".