19623508312 has 8 divisors (see below), whose sum is σ = 36794078100. Its totient is φ = 9811754152.

The previous prime is 19623508279. The next prime is 19623508327. The reversal of 19623508312 is 21380532691.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×19623508312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1226469262 + ... + 1226469277.

Almost surely, 2^19623508312 is an apocalyptic number.

It is an amenable number.

19623508312 is a deficient number, since it is larger than the sum of its proper divisors (17170569788).

19623508312 is a wasteful number, since it uses less digits than its factorization.

19623508312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452938545 (or 2452938541 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 19623508312 in words is "nineteen billion, six hundred twenty-three million, five hundred eight thousand, three hundred twelve".