19679842 has 16 divisors (see below), whose sum is σ = 36332352. Its totient is φ = 7785360.

The previous prime is 19679837. The next prime is 19679857. The reversal of 19679842 is 24897691.

It is a super-2 number, since 2×19679842² = 774592362289928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19679792 and 19679801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53884 + ... + 54247.

It is an arithmetic number, because the mean of its divisors is an integer number (2270772).

Almost surely, 2^19679842 is an apocalyptic number.

19679842 is a deficient number, since it is larger than the sum of its proper divisors (16652510).

19679842 is a wasteful number, since it uses less digits than its factorization.

19679842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108153.

The product of its digits is 217728, while the sum is 46.

The square root of 19679842 is about 4436.1967945527. The cubic root of 19679842 is about 269.9855593557.

The spelling of 19679842 in words is "nineteen million, six hundred seventy-nine thousand, eight hundred forty-two".