19995142 has 12 divisors (see below), whose sum is σ = 31355100. Its totient is φ = 9562388.

The previous prime is 19995139. The next prime is 19995149. The reversal of 19995142 is 24159991.

It is a junction number, because it is equal to n+sod(n) for n = 19995095 and 19995104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19995149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8392 + ... + 10507.

It is an arithmetic number, because the mean of its divisors is an integer number (2612925).

Almost surely, 2^19995142 is an apocalyptic number.

19995142 is a deficient number, since it is larger than the sum of its proper divisors (11359958).

19995142 is a wasteful number, since it uses less digits than its factorization.

19995142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18947 (or 18924 counting only the distinct ones).

The product of its digits is 29160, while the sum is 40.

The square root of 19995142 is about 4471.5927811016. The cubic root of 19995142 is about 271.4197821452.

The spelling of 19995142 in words is "nineteen million, nine hundred ninety-five thousand, one hundred forty-two".