19908023 has 2 divisors, whose sum is σ = 19908024. Its totient is φ = 19908022.

The previous prime is 19908017. The next prime is 19908059. The reversal of 19908023 is 32080991.

It is a weak prime.

It is an emirp because it is prime and its reverse (32080991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19908023 - 2⁶ = 19907959 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19908223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9954011 + 9954012.

It is an arithmetic number, because the mean of its divisors is an integer number (9954012).

Almost surely, 2^19908023 is an apocalyptic number.

19908023 is a deficient number, since it is larger than the sum of its proper divisors (1).

19908023 is an equidigital number, since it uses as much as digits as its factorization.

19908023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19908023 is about 4461.8407636311. The cubic root of 19908023 is about 271.0250155055.

The spelling of 19908023 in words is "nineteen million, nine hundred eight thousand, twenty-three".