19730864237 has 16 divisors (see below), whose sum is σ = 23504684160. Its totient is φ = 16209471168.

The previous prime is 19730864233. The next prime is 19730864243. The reversal of 19730864237 is 73246803791.

It is a cyclic number.

It is not a de Polignac number, because 19730864237 - 2² = 19730864233 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19730864233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551162 + ... + 585867.

It is an arithmetic number, because the mean of its divisors is an integer number (1469042760).

Almost surely, 2^19730864237 is an apocalyptic number.

It is an amenable number.

19730864237 is a deficient number, since it is larger than the sum of its proper divisors (3773819923).

19730864237 is a wasteful number, since it uses less digits than its factorization.

19730864237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137140.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The spelling of 19730864237 in words is "nineteen billion, seven hundred thirty million, eight hundred sixty-four thousand, two hundred thirty-seven".