20013807 has 16 divisors (see below), whose sum is σ = 29662848. Its totient is φ = 11899680.

The previous prime is 20013793. The next prime is 20013809. The reversal of 20013807 is 70831002.

It is not a de Polignac number, because 20013807 - 2¹¹ = 20011759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3973 + ... + 7470.

It is an arithmetic number, because the mean of its divisors is an integer number (1853928).

Almost surely, 2^20013807 is an apocalyptic number.

20013807 is a deficient number, since it is larger than the sum of its proper divisors (9649041).

20013807 is a wasteful number, since it uses less digits than its factorization.

20013807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11510.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20013807 is about 4473.6793582017. The cubic root of 20013807 is about 271.5042105645.

Adding to 20013807 its reverse (70831002), we get a palindrome (90844809).

The spelling of 20013807 in words is "twenty million, thirteen thousand, eight hundred seven".