19725030 has 96 divisors (see below), whose sum is σ = 57710016. Its totient is φ = 4637952.

The previous prime is 19725029. The next prime is 19725037. The reversal of 19725030 is 3052791.

It is a junction number, because it is equal to n+sod(n) for n = 19724985 and 19725003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19725037) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26544 + ... + 27276.

It is an arithmetic number, because the mean of its divisors is an integer number (601146).

Almost surely, 2^19725030 is an apocalyptic number.

19725030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19725030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28855008).

19725030 is an abundant number, since it is smaller than the sum of its proper divisors (37984986).

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

19725030 is a wasteful number, since it uses less digits than its factorization.

19725030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 19725030 is about 4441.2869756412. The cubic root of 19725030 is about 270.1920444410.

The spelling of 19725030 in words is "nineteen million, seven hundred twenty-five thousand, thirty".