19963020 has 192 divisors, whose sum is σ = 72576000. Its totient is φ = 3978240.

The previous prime is 19963019. The next prime is 19963037. The reversal of 19963020 is 2036991.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133906 + ... + 134054.

It is an arithmetic number, because the mean of its divisors is an integer number (378000).

Almost surely, 2^19963020 is an apocalyptic number.

19963020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19963020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36288000).

19963020 is an abundant number, since it is smaller than the sum of its proper divisors (52612980).

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

19963020 is a wasteful number, since it uses less digits than its factorization.

19963020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 19963020 is about 4467.9995523724. Note that the first 3 decimals coincide. The cubic root of 19963020 is about 271.2743598360.

The spelling of 19963020 in words is "nineteen million, nine hundred sixty-three thousand, twenty".