19942163 has 4 divisors (see below), whose sum is σ = 19983600. Its totient is φ = 19900728.

The previous prime is 19942129. The next prime is 19942187. The reversal of 19942163 is 36124991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19942163 - 2⁶ = 19942099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19942123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19988 + ... + 20961.

It is an arithmetic number, because the mean of its divisors is an integer number (4995900).

Almost surely, 2^19942163 is an apocalyptic number.

19942163 is a deficient number, since it is larger than the sum of its proper divisors (41437).

19942163 is an equidigital number, since it uses as much as digits as its factorization.

19942163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41436.

The product of its digits is 11664, while the sum is 35.

The square root of 19942163 is about 4465.6649001017. The cubic root of 19942163 is about 271.1798527438.

The spelling of 19942163 in words is "nineteen million, nine hundred forty-two thousand, one hundred sixty-three".