19806300320 has 24 divisors (see below), whose sum is σ = 46792384884. Its totient is φ = 7922520064.

The previous prime is 19806300277. The next prime is 19806300329. The reversal of 19806300320 is 2300360891.

It can be written as a sum of positive squares in 2 ways, for example, as 16436265616 + 3370034704 = 128204^2 + 58052^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (19806300329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61894529 + ... + 61894848.

Almost surely, 2^19806300320 is an apocalyptic number.

19806300320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19806300320 is an abundant number, since it is smaller than the sum of its proper divisors (26986084564).

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

19806300320 is a wasteful number, since it uses less digits than its factorization.

19806300320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123789392 (or 123789384 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 19806300320 in words is "nineteen billion, eight hundred six million, three hundred thousand, three hundred twenty".