19830740 has 24 divisors (see below), whose sum is σ = 42614880. Its totient is φ = 7747488.

The previous prime is 19830689. The next prime is 19830773. The reversal of 19830740 is 4703891.

It is a junction number, because it is equal to n+sod(n) for n = 19830697 and 19830706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10670 + ... + 12389.

It is an arithmetic number, because the mean of its divisors is an integer number (1775620).

Almost surely, 2^19830740 is an apocalyptic number.

19830740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19830740 is an abundant number, since it is smaller than the sum of its proper divisors (22784140).

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

19830740 is a wasteful number, since it uses less digits than its factorization.

19830740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23111 (or 23109 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 19830740 is about 4453.1719032618. The cubic root of 19830740 is about 270.6738540912.

The spelling of 19830740 in words is "nineteen million, eight hundred thirty thousand, seven hundred forty".