19770037309 has 16 divisors (see below), whose sum is σ = 22310885376. Its totient is φ = 17355610800.

The previous prime is 19770037241. The next prime is 19770037327. The reversal of 19770037309 is 90373007791.

It is not a de Polignac number, because 19770037309 - 2⁷ = 19770037181 is a prime.

It is a super-2 number, since 2×19770037309² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19770037709) 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 15 ways as a sum of consecutive naturals, for example, 97174 + ... + 221320.

It is an arithmetic number, because the mean of its divisors is an integer number (1394430336).

Almost surely, 2^19770037309 is an apocalyptic number.

It is an amenable number.

19770037309 is a deficient number, since it is larger than the sum of its proper divisors (2540848067).

19770037309 is a wasteful number, since it uses less digits than its factorization.

19770037309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124656.

The product of its (nonzero) digits is 250047, while the sum is 46.

The spelling of 19770037309 in words is "nineteen billion, seven hundred seventy million, thirty-seven thousand, three hundred nine".