19773073 has 8 divisors (see below), whose sum is σ = 20128680. Its totient is φ = 19420800.

The previous prime is 19773067. The next prime is 19773097. The reversal of 19773073 is 37037791.

It can be written as a sum of positive squares in 4 ways, for example, as 4028049 + 15745024 = 2007^2 + 3968^2 .

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 19773073 - 2¹⁷ = 19642001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19770073) by changing a digit.

It is a Kaprekar number, because its square (390974415863329) can be partitioned into two parts whose sum is 19773073.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13123 + ... + 14551.

It is an arithmetic number, because the mean of its divisors is an integer number (2516085).

Almost surely, 2^19773073 is an apocalyptic number.

It is an amenable number.

19773073 is a deficient number, since it is larger than the sum of its proper divisors (355607).

19773073 is a wasteful number, since it uses less digits than its factorization.

19773073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667.

The product of its (nonzero) digits is 27783, while the sum is 37.

The square root of 19773073 is about 4446.6923662426. The cubic root of 19773073 is about 270.4112297733.

It can be divided in two parts, 1977 and 3073, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 19773073 in words is "nineteen million, seven hundred seventy-three thousand, seventy-three".