19873973 has 8 divisors (see below), whose sum is σ = 23098560. Its totient is φ = 16745760.

The previous prime is 19873963. The next prime is 19873991. The reversal of 19873973 is 37937891.

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 19873973 - 2⁴ = 19873957 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 (19873913) 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, 23648 + ... + 24473.

It is an arithmetic number, because the mean of its divisors is an integer number (2887320).

Almost surely, 2^19873973 is an apocalyptic number.

It is an amenable number.

19873973 is a deficient number, since it is larger than the sum of its proper divisors (3224587).

19873973 is an equidigital number, since it uses as much as digits as its factorization.

19873973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48187.

The product of its digits is 285768, while the sum is 47.

The square root of 19873973 is about 4458.0234409433. The cubic root of 19873973 is about 270.8704100299.

It can be divided in two parts, 1987 and 3973, that multiplied together give a triangular number (7894351 = T₃₉₇₃).

The spelling of 19873973 in words is "nineteen million, eight hundred seventy-three thousand, nine hundred seventy-three".