19929073 has 4 divisors (see below), whose sum is σ = 20202148. Its totient is φ = 19656000.

The previous prime is 19929067. The next prime is 19929089. The reversal of 19929073 is 37092991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37092991 = 13 ⋅2853307.

It can be written as a sum of positive squares in 2 ways, for example, as 16056049 + 3873024 = 4007^2 + 1968^2 .

It is a cyclic number.

It is not a de Polignac number, because 19929073 - 2¹⁷ = 19798001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19929673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136428 + ... + 136573.

It is an arithmetic number, because the mean of its divisors is an integer number (5050537).

Almost surely, 2^19929073 is an apocalyptic number.

It is an amenable number.

19929073 is a deficient number, since it is larger than the sum of its proper divisors (273075).

19929073 is an equidigital number, since it uses as much as digits as its factorization.

19929073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273074.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 19929073 is about 4464.1990323013. The cubic root of 19929073 is about 271.1205057672.

The spelling of 19929073 in words is "nineteen million, nine hundred twenty-nine thousand, seventy-three".