20499073 has 8 divisors (see below), whose sum is σ = 24060992. Its totient is φ = 17095536.

The previous prime is 20499071. The next prime is 20499077. The reversal of 20499073 is 37099402.

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 20499073 - 2¹ = 20499071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20499071) 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, 39315 + ... + 39832.

It is an arithmetic number, because the mean of its divisors is an integer number (3007624).

Almost surely, 2^20499073 is an apocalyptic number.

It is an amenable number.

20499073 is a deficient number, since it is larger than the sum of its proper divisors (3561919).

20499073 is an equidigital number, since it uses as much as digits as its factorization.

20499073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79191.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20499073 is about 4527.5901978867. The cubic root of 20499073 is about 273.6810583742.

The spelling of 20499073 in words is "twenty million, four hundred ninety-nine thousand, seventy-three".