19945520337 has 8 divisors (see below), whose sum is σ = 26868192736. Its totient is φ = 13159930752.

The previous prime is 19945520303. The next prime is 19945520341. The reversal of 19945520337 is 73302554991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19945520337 - 2⁷ = 19945520209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19945520537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34270363 + ... + 34270944.

It is an arithmetic number, because the mean of its divisors is an integer number (3358524092).

Almost surely, 2^19945520337 is an apocalyptic number.

It is an amenable number.

19945520337 is a deficient number, since it is larger than the sum of its proper divisors (6922672399).

19945520337 is an equidigital number, since it uses as much as digits as its factorization.

19945520337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68541407.

The product of its (nonzero) digits is 1020600, while the sum is 48.

The spelling of 19945520337 in words is "nineteen billion, nine hundred forty-five million, five hundred twenty thousand, three hundred thirty-seven".