19730073 has 16 divisors (see below), whose sum is σ = 28797696. Its totient is φ = 11916240.

The previous prime is 19730071. The next prime is 19730089. The reversal of 19730073 is 37003791.

It is not a de Polignac number, because 19730073 - 2¹ = 19730071 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 19730073.

It is not an unprimeable number, because it can be changed into a prime (19730071) 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, 10590 + ... + 12312.

It is an arithmetic number, because the mean of its divisors is an integer number (1799856).

Almost surely, 2^19730073 is an apocalyptic number.

It is an amenable number.

19730073 is a deficient number, since it is larger than the sum of its proper divisors (9067623).

19730073 is a wasteful number, since it uses less digits than its factorization.

19730073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084.

The product of its (nonzero) digits is 3969, while the sum is 30.

The square root of 19730073 is about 4441.8546801984. The cubic root of 19730073 is about 270.2150686963.

The spelling of 19730073 in words is "nineteen million, seven hundred thirty thousand, seventy-three".