19695142 has 4 divisors (see below), whose sum is σ = 29542716. Its totient is φ = 9847570.

The previous prime is 19695139. The next prime is 19695149. The reversal of 19695142 is 24159691.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19695149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4923784 + ... + 4923787.

It is an arithmetic number, because the mean of its divisors is an integer number (7385679).

Almost surely, 2^19695142 is an apocalyptic number.

19695142 is a deficient number, since it is larger than the sum of its proper divisors (9847574).

19695142 is an equidigital number, since it uses as much as digits as its factorization.

19695142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9847573.

The product of its digits is 19440, while the sum is 37.

The square root of 19695142 is about 4437.9209096152. The cubic root of 19695142 is about 270.0555075635.

The spelling of 19695142 in words is "nineteen million, six hundred ninety-five thousand, one hundred forty-two".