19481930 has 16 divisors (see below), whose sum is σ = 37765224. Its totient is φ = 7193280.

The previous prime is 19481911. The next prime is 19481933. The reversal of 19481930 is 3918491.

It can be written as a sum of positive squares in 4 ways, for example, as 9628609 + 9853321 = 3103^2 + 3139^2 .

It is not an unprimeable number, because it can be changed into a prime (19481933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74801 + ... + 75060.

Almost surely, 2^19481930 is an apocalyptic number.

19481930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19481930 is a deficient number, since it is larger than the sum of its proper divisors (18283294).

19481930 is a wasteful number, since it uses less digits than its factorization.

19481930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149881.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 19481930 is about 4413.8339343478. The cubic root of 19481930 is about 269.0774641818.

The spelling of 19481930 in words is "nineteen million, four hundred eighty-one thousand, nine hundred thirty".