19954165312 has 28 divisors (see below), whose sum is σ = 40873858816. Its totient is φ = 9655240320.

The previous prime is 19954165307. The next prime is 19954165339. The reversal of 19954165312 is 21356145991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5026788 + ... + 5030755.

It is an arithmetic number, because the mean of its divisors is an integer number (1459780672).

Almost surely, 2^19954165312 is an apocalyptic number.

It is an amenable number.

19954165312 is an abundant number, since it is smaller than the sum of its proper divisors (20919693504).

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

19954165312 is a wasteful number, since it uses less digits than its factorization.

19954165312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057586 (or 10057576 counting only the distinct ones).

The product of its digits is 291600, while the sum is 46.

The spelling of 19954165312 in words is "nineteen billion, nine hundred fifty-four million, one hundred sixty-five thousand, three hundred twelve".