19730001973 has 8 divisors (see below), whose sum is σ = 21534571296. Its totient is φ = 17927254800.

The previous prime is 19730001971. The next prime is 19730002003. The reversal of 19730001973 is 37910003791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19730001973 - 2¹ = 19730001971 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 (19730001971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432843 + ... + 476248.

It is an arithmetic number, because the mean of its divisors is an integer number (2691821412).

Almost surely, 2^19730001973 is an apocalyptic number.

It is an amenable number.

19730001973 is a deficient number, since it is larger than the sum of its proper divisors (1804569323).

19730001973 is a wasteful number, since it uses less digits than its factorization.

19730001973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911075.

The product of its (nonzero) digits is 35721, while the sum is 40.

The spelling of 19730001973 in words is "nineteen billion, seven hundred thirty million, one thousand, nine hundred seventy-three".