19869942 has 8 divisors (see below), whose sum is σ = 39739896. Its totient is φ = 6623312.

The previous prime is 19869919. The next prime is 19869947. The reversal of 19869942 is 24996891.

It is a sphenic number, since it is the product of 3 distinct primes.

19869942 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 19869891 and 19869900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19869947) 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, 1655823 + ... + 1655834.

It is an arithmetic number, because the mean of its divisors is an integer number (4967487).

Almost surely, 2^19869942 is an apocalyptic number.

19869942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19869942 is a wasteful number, since it uses less digits than its factorization.

19869942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311662.

The product of its digits is 279936, while the sum is 48.

The square root of 19869942 is about 4457.5713118244. The cubic root of 19869942 is about 270.8520954155.

The spelling of 19869942 in words is "nineteen million, eight hundred sixty-nine thousand, nine hundred forty-two".