19630980 has 72 divisors (see below), whose sum is σ = 59963904. Its totient is φ = 5198400.

The previous prime is 19630973. The next prime is 19630981. The reversal of 19630980 is 8903691.

19630980 is a `hidden beast` number, since 19 + 630 + 9 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19630981) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 34095 + ... + 34665.

It is an arithmetic number, because the mean of its divisors is an integer number (832832).

Almost surely, 2^19630980 is an apocalyptic number.

19630980 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 19630980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29981952).

19630980 is an abundant number, since it is smaller than the sum of its proper divisors (40332924).

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

19630980 is a wasteful number, since it uses less digits than its factorization.

19630980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19630980 is about 4430.6861771062. The cubic root of 19630980 is about 269.7619300635.

The spelling of 19630980 in words is "nineteen million, six hundred thirty thousand, nine hundred eighty".