19816030 has 32 divisors (see below), whose sum is σ = 38614464. Its totient is φ = 7278336.

The previous prime is 19816007. The next prime is 19816051. The reversal of 19816030 is 3061891.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19816030.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40447 + ... + 40933.

It is an arithmetic number, because the mean of its divisors is an integer number (1206702).

Almost surely, 2^19816030 is an apocalyptic number.

19816030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19816030 is a deficient number, since it is larger than the sum of its proper divisors (18798434).

19816030 is a wasteful number, since it uses less digits than its factorization.

19816030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 19816030 is about 4451.5199651355. The cubic root of 19816030 is about 270.6069109298.

It can be divided in two parts, 198 and 16030, that multiplied together give a triangular number (3173940 = T₂₅₁₉).

The spelling of 19816030 in words is "nineteen million, eight hundred sixteen thousand, thirty".