19914251064 has 32 divisors (see below), whose sum is σ = 50043595920. Its totient is φ = 6603687936.

The previous prime is 19914251057. The next prime is 19914251083. The reversal of 19914251064 is 46015241991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2145007 + ... + 2154270.

Almost surely, 2^19914251064 is an apocalyptic number.

It is an amenable number.

19914251064 is an abundant number, since it is smaller than the sum of its proper divisors (30129344856).

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

19914251064 is a wasteful number, since it uses less digits than its factorization.

19914251064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4299479 (or 4299475 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 19914251064 in words is "nineteen billion, nine hundred fourteen million, two hundred fifty-one thousand, sixty-four".