19356730240 has 64 divisors (see below), whose sum is σ = 46751891760. Its totient is φ = 7662845952.

The previous prime is 19356730223. The next prime is 19356730249. The reversal of 19356730240 is 4203765391.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 19356730193 and 19356730202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19356730249) 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, 93822 + ... + 217981.

Almost surely, 2^19356730240 is an apocalyptic number.

19356730240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19356730240 is an abundant number, since it is smaller than the sum of its proper divisors (27395161520).

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

19356730240 is an equidigital number, since it uses as much as digits as its factorization.

19356730240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311919 (or 311907 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 40.

The spelling of 19356730240 in words is "nineteen billion, three hundred fifty-six million, seven hundred thirty thousand, two hundred forty".