19530396 has 72 divisors (see below), whose sum is σ = 52101504. Its totient is φ = 6395760.

The previous prime is 19530373. The next prime is 19530409. The reversal of 19530396 is 69303591.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19530396.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68871 + ... + 69153.

It is an arithmetic number, because the mean of its divisors is an integer number (723632).

Almost surely, 2^19530396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19530396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26050752).

19530396 is an abundant number, since it is smaller than the sum of its proper divisors (32571108).

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

19530396 is a wasteful number, since it uses less digits than its factorization.

19530396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The square root of 19530396 is about 4419.3207622892. The cubic root of 19530396 is about 269.3004111040.

The spelling of 19530396 in words is "nineteen million, five hundred thirty thousand, three hundred ninety-six".