19678020 has 24 divisors (see below), whose sum is σ = 55098624. Its totient is φ = 5247456.

The previous prime is 19678019. The next prime is 19678033. The reversal of 19678020 is 2087691.

It is a super-2 number, since 2×19678020² = 774448942240800, which contains 22 as substring.

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, 163924 + ... + 164043.

It is an arithmetic number, because the mean of its divisors is an integer number (2295776).

Almost surely, 2^19678020 is an apocalyptic number.

19678020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19678020 is an abundant number, since it is smaller than the sum of its proper divisors (35420604).

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

19678020 is a wasteful number, since it uses less digits than its factorization.

19678020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327979 (or 327977 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 19678020 is about 4435.9914337158. The cubic root of 19678020 is about 269.9772271602.

The spelling of 19678020 in words is "nineteen million, six hundred seventy-eight thousand, twenty".