20099247 has 8 divisors (see below), whose sum is σ = 30627456. Its totient is φ = 11485272.

The previous prime is 20099231. The next prime is 20099267. The reversal of 20099247 is 74299002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20099247 - 2⁴ = 20099231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20099267) by changing a digit.

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, 478533 + ... + 478574.

It is an arithmetic number, because the mean of its divisors is an integer number (3828432).

Almost surely, 2^20099247 is an apocalyptic number.

20099247 is a deficient number, since it is larger than the sum of its proper divisors (10528209).

20099247 is an equidigital number, since it uses as much as digits as its factorization.

20099247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957117.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 20099247 is about 4483.2183752300. The cubic root of 20099247 is about 271.8900173499.

The spelling of 20099247 in words is "twenty million, ninety-nine thousand, two hundred forty-seven".