20200815 has 12 divisors (see below), whose sum is σ = 35014824. Its totient is φ = 10773744.

The previous prime is 20200813. The next prime is 20200837. The reversal of 20200815 is 51800202.

It is not a de Polignac number, because 20200815 - 2¹ = 20200813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224409 + ... + 224498.

It is an arithmetic number, because the mean of its divisors is an integer number (2917902).

Almost surely, 2^20200815 is an apocalyptic number.

20200815 is a deficient number, since it is larger than the sum of its proper divisors (14814009).

20200815 is a wasteful number, since it uses less digits than its factorization.

20200815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448918 (or 448915 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20200815 is about 4494.5316774943. The cubic root of 20200815 is about 272.3472308140.

The spelling of 20200815 in words is "twenty million, two hundred thousand, eight hundred fifteen".