19860245340 has 48 divisors (see below), whose sum is σ = 59886280608. Its totient is φ = 4888675584.

The previous prime is 19860245323. The next prime is 19860245341. The reversal of 19860245340 is 4354206891.

It is a junction number, because it is equal to n+sod(n) for n = 19860245292 and 19860245301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19860245341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12730147 + ... + 12731706.

It is an arithmetic number, because the mean of its divisors is an integer number (1247630846).

Almost surely, 2^19860245340 is an apocalyptic number.

19860245340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19860245340 is an abundant number, since it is smaller than the sum of its proper divisors (40026035268).

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

19860245340 is a wasteful number, since it uses less digits than its factorization.

19860245340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25461878 (or 25461876 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 19860245340 in words is "nineteen billion, eight hundred sixty million, two hundred forty-five thousand, three hundred forty".