19860042 has 16 divisors (see below), whose sum is σ = 40007520. Its totient is φ = 6572112.

The previous prime is 19860037. The next prime is 19860053. The reversal of 19860042 is 24006891.

It is a junction number, because it is equal to n+sod(n) for n = 19859991 and 19860009.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11073 + ... + 12740.

It is an arithmetic number, because the mean of its divisors is an integer number (2500470).

Almost surely, 2^19860042 is an apocalyptic number.

19860042 is an abundant number, since it is smaller than the sum of its proper divisors (20147478).

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

19860042 is a wasteful number, since it uses less digits than its factorization.

19860042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23957.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 19860042 is about 4456.4607032936. The cubic root of 19860042 is about 270.8071048262.

The spelling of 19860042 in words is "nineteen million, eight hundred sixty thousand, forty-two".