20049715 has 32 divisors (see below), whose sum is σ = 30081024. Its totient is φ = 12510720.

The previous prime is 20049709. The next prime is 20049719. The reversal of 20049715 is 51794002.

It is a happy number.

It is not a de Polignac number, because 20049715 - 2¹¹ = 20047667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20049719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17902 + ... + 18988.

It is an arithmetic number, because the mean of its divisors is an integer number (940032).

Almost surely, 2^20049715 is an apocalyptic number.

20049715 is a deficient number, since it is larger than the sum of its proper divisors (10031309).

20049715 is a wasteful number, since it uses less digits than its factorization.

20049715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20049715 is about 4477.6908111213. The cubic root of 20049715 is about 271.6664876777. Note that the first 3 decimals are identical.

The spelling of 20049715 in words is "twenty million, forty-nine thousand, seven hundred fifteen".