19939065356 has 12 divisors (see below), whose sum is σ = 39878130768. Its totient is φ = 8545313712.

The previous prime is 19939065353. The next prime is 19939065361. The reversal of 19939065356 is 65356093991.

19939065356 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (19939065353) 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, 356054711 + ... + 356054766.

It is an arithmetic number, because the mean of its divisors is an integer number (3323177564).

Almost surely, 2^19939065356 is an apocalyptic number.

It is an amenable number.

19939065356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19939065356 is a wasteful number, since it uses less digits than its factorization.

19939065356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712109488 (or 712109486 counting only the distinct ones).

The product of its (nonzero) digits is 5904900, while the sum is 56.

The spelling of 19939065356 in words is "nineteen billion, nine hundred thirty-nine million, sixty-five thousand, three hundred fifty-six".