19630140 has 48 divisors (see below), whose sum is σ = 56010528. Its totient is φ = 5135104.

The previous prime is 19630123. The next prime is 19630183. The reversal of 19630140 is 4103691.

It is a self number, because there is not a number n which added to its sum of digits gives 19630140.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 94 + ... + 6266.

It is an arithmetic number, because the mean of its divisors is an integer number (1166886).

Almost surely, 2^19630140 is an apocalyptic number.

19630140 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 19630140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28005264).

19630140 is an abundant number, since it is smaller than the sum of its proper divisors (36380388).

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

19630140 is a wasteful number, since it uses less digits than its factorization.

19630140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238 (or 6236 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 19630140 is about 4430.5913826486. The cubic root of 19630140 is about 269.7580823484.

The spelling of 19630140 in words is "nineteen million, six hundred thirty thousand, one hundred forty".